1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x059d02d0a0700b705409c27479c8659158e8ec969410c3b287b9aa0483e7866d. Chain 2 (Bitcoin): anchored in block 953819 (2026-06-15T18:31:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ffab6c92-f174-46a2-a4ab-74326d298e41.json and https://artists.proofprofile.net/proofs/artist/ffab6c92-f174-46a2-a4ab-74326d298e41.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xace604112b75e4e6c9a7e36b468930850545fbe333e91608b8931d291a5e4843. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZES72530505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c587dbd21382b5714e4b0a05a051a688ae9eb3483815af491251b7e3bd674d8. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZES72536752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2ca3dc1b48298658d867d80b758d6399ab48200159a7830e9ad38598e5711ac. Chain 2 (Bitcoin): anchored in block 958627 (2026-07-18T23:33:54Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZES72532628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe45d27e9eea5322bc8ecf7addf12ce8311dfe2f37019a06af81769b9af2bedbd. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZES72536757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80c48a75ff222be6168c3a196ac4f7909df7435bd889d46a05f5124f66a58ebb. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZES72532627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1016243c1b8cab41b92f0ce121a07e5fdb35f67c1b30e2c517bae9e092bf344f. Chain 2 (Bitcoin): anchored in block 958625 (2026-07-18T23:11:57Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZES72528147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x083f7ebf49ccdfa3487402cb7ef3bc649790bbb62f2c86dd4a5188ee795ff25b. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZES72532611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e29455fdfc00dfeea074959fcbf32883b8b3b5ae3e080a84efc5e4cbc4f69b6. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZES72530512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x525c139e6b17126e1efa34cc3710bcf096ff4ca74cc7afcc8dce644a21c68b6a. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZES72536753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77a3336c68ba3381ec0f47e372dcb9b01b5a10ab06f754014a8dd83ebc17d1b6. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZES72534686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0147cab1b583586f9826ec707d9437de5aef9f7f6a7a95de271965ee710c9438. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZES72532620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8f7d145e4817eebb5f3b71053bb72b4a9e7227bd071f6ecef6136512125fb6d. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZES72536755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x243ba8a0b2edc01f5d9633ce178cc33f0a5b6509730ac813b4cb56cb48501e61. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZES72534687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fd3d73dab10fc46369344dcde6d286801e2891861f0eb2483152de3799e4dca. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZES72532616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4baf44cee785277722125d76864de96f18adf963d607f474bc7848393f6538f. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZES72536826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11db2c8086527dcc95c28e8b18328ff8b8ad8392903fedb08cfe3937eb9a8838. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZES72536772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cd1f7430a20ed2fa9567e343bd44f9698afc197da2adc83da166723e4447041. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZES72536771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04c3067755565e15e2f65905f80838fd26902a0347f9fac3789417657db71307. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZES72536776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42f6cffd3f5d80b051c0df3b429a028357c70ccf6590f1c37f047e2354bbbe81. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZES72536769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dfff4df07a54f4f7a9efc1d75f9b688b8ffe252e1839340e45ec8aaad70ba0b. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZWFG2524113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x593155f2edff9edb0eeba8fbd1c94a2a3201815e7ff6d9e579a0e69dfc8ac1ec. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZWFG2551418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb177f4958bad3a6f9deba639c247b80dff0257e92c28190622b0f0034d47051e. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T00:52:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZWFG2544380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a0ef2bf3aff7f3bc061b1cca16b2c0f32cbba67ff3c2eca74f12d9209e5dbbb. Chain 2 (Bitcoin): anchored in block 959145 (2026-07-22T15:39:05Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZWFG2528198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb533413d597f6b38c42941ab1c834fdfad01aab084952595f53a7f0d574d865c. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T04:55:29Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZWFG2561011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae09aa750a9af5b4edd4da99ff8f4154feb74bc73534ef45d33c36e46f9f3023. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZWFG2549614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef651913b56d6ab5cc2668526c12b3f00294724e43d4fadf620820cd82b03c30. Chain 2 (Bitcoin): anchored in block 959145 (2026-07-22T15:39:05Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZWFG2542410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e17b8345226f75ca4831a7f18ab72c92b8fc5d4c04c5f6a29afb3ebe2f16369. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZWFH2566517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7981cc97ed4c850fac7b29159ef5c02af6bb0b97a71449d06704fa4114dece00. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZWFH2552096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf937dffd509374798889c9001debdfb334539e3e0a2697a6d7ab6bb473935e0f. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZWFL2585058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f54b1aa29ead7d49aee583b3695c9d5d7411f21d00f515c6d529dbe0dc87d18. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QT3FG2558468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72542a8e2f8cf3e7c5340dec897449f4aacf28288005f475d05607e292973d86. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QT3FG2556364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2da47e84c6192510094e94750de6bdee419e21a27623ee74c4612114a28dbe25. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QT3FG2558458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4f88078e4427b3c490938bf62cb666a6e84676ddfada538de9b0c4eff45e453. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QT3FG2580785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x201bafce8c3fbdba9e6d79ee13ea173f87920a84d592c87ae6f3cb82c674b42c. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QT3FH2508441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa84f1e06dffe370710b03cd4c919c9be29cd3806d5552635623f22e92885ad8d. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QT3FH2508436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07cce6c2ee301a4d94d6037f42c8391421f2212dc2b0745d06c7677cc21dc8b0. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QT3FH2508439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3fb5ec4ee54cefa02c83371568ac7a3996e1529291c57a12f87c789669100cb. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T15:07:00Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QT6E52527367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x084c868dd1b764fc13efd26aa974b6c310e60cc33e9a4b693c31e4de28342920. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QT6E52527386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94e33f4ed07d44f370105a84be975ea2629f810365afcc78143ab4745f7e8763. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QT6E52527362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x151b9fbce58e5cbc2fcb33122587a7cb616c27f84c25846169d71ecb0bb3f1d8. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QT6E52527384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89cacdb5cffed701f9f447ea58609534bd2752d58272bf75f10063ac3b4e6945. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QT6E52527385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5be55c4e9c7c942958d6d365569ccdce5a2b90f0677f950974ffd050e2dd335b. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QT6E52527387.