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 0x02ba0d63139672b3c6a70e4ce45912845e7f96591f51b1fa73c3879e4fdd8e7e. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5f2ece0b-f83d-47fc-8fb7-53cb218f9795.json and https://artists.proofprofile.net/proofs/artist/5f2ece0b-f83d-47fc-8fb7-53cb218f9795.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 0xcf530e3c0fee689cff6dadb6e94c9625d69bb20bdb86a2f925937349fbbda2db. Chain 2 (Bitcoin): anchored in block 958827 (2026-07-20T05:07:11Z), 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/QZKDK2107794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9368e1ac66c1e7d8b3e94eeeec8cfc2048ba8c897c15d33b814844bcc00c590d. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QM42K2191830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x785b1c1e030d27ce8905994309252a5461c281092a3c9e757c770716096fea82. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/QZS672105519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf530e3c0fee689cff6dadb6e94c9625d69bb20bdb86a2f925937349fbbda2db. Chain 2 (Bitcoin): anchored in block 958676 (2026-07-19T05:43:13Z), 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/QZKDK2107794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fa1ab980774e6803f4d143aa9090192ad49909e14fed6ace1974d305fdb0d6a. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZS652175928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb531fc21d48648380f80f9479d62a15f72db8a3e3fca8d7be92d5caef11b1f1d. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZS662226721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cb1277d41822ee47ca2f9cb8f4b7e7d5835684a6ed841ffd3e4f1267cc40958. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/QZMHL2233079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd627d3cdf736ae072dc40f3830eebffee02f484dddf8451b590b08bb512ef875. Chain 2 (Bitcoin): anchored in block 959063 (2026-07-21T21:45:32Z), 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/QZMHL2269893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfd9cb057341fc63b6259bdc9ce67ef7926f5ff8fda8597daf69fbc0d5a5034f. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/QZS652208188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61587d56b070216643035a449072567a4e43be2928010036f3457a1b91996ea5. Chain 2 (Bitcoin): anchored in block 959073 (2026-07-21T23:25:37Z), 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/QZS662215571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96c6470aff656c370fa16cc6bedb86a8e3794d2be1758f0c7714ac37d885a500. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/QZMHL2281015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2c0b636e38cd5b2d6da2dbaf54cbe485017f583db4425f9876760092ea13fe7. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/DEPI82217086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd807b041f6f468f4fbeac1e6d7398afd2f660c160cd8f8c47e4af79cb7f90d70. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/DEPI82220458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfd3262464e46d16ed300cf2dea3503a194f64389f9ba306d4760857d9eab0e7. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T00:07:05Z), 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/DEPI82457824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacc97c8b8c6330aae228521bcf9b715bf7c02c7d9aa63e390f571b1c01c69142. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/DEPI82457857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf45cfdd1b66d873aabee9ea30bee8760573d995e6d1bc65ab2d6660b28151b7b. Chain 2 (Bitcoin): anchored in block 959034 (2026-07-21T16:34:25Z), 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/DEPI82457833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee8955977cdddebfe170e0ee662a0ffdc6e880519cb5428e1ebe4146183a077e. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/DEPI82458076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe2d26c69a3823f36932b092825eeba6d88de8b91becf05fe5a271ffe72703b4. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/DEPI82500059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85fe1cbf4440388bcbb5dd70dd710319ada913d754ca3bce8e835374ce19272a. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T05:02:52Z), 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/DEPI82500304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x091273fa51ca3c485dd93929a8ee069b3332e98f398561a387fdea0763d37d45. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/DEPI82500306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c9b0fb69774eef3c1c37e05577c1b97d18d7218b22b9322cf0589b5fccc6129. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/DEPI82501205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdff4d2ddff7e6828f93cc239f7b430c37cc0896dd5419573dbf9cc9ed775baa0. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/DEPI82502384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f3138aefb275370af0632722129636b04dba20b9dcf8a1587f046e156357153. Chain 2 (Bitcoin): anchored in block 958585 (2026-07-18T17:05:16Z), 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/DEPI82512280.