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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eb46676e6ec1bdf2f2db031e9363693f483a26d427ed40bb7fad71447540be2. 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/49acaf62-d1a2-4e97-b736-0f58c4d8eb84.json and https://artists.proofprofile.net/proofs/artist/49acaf62-d1a2-4e97-b736-0f58c4d8eb84.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76ced215867763e1dd0e5ed7a3d22e3156b6b14ea454418d9c4db38eeab826dc. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T10:19:51Z), 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/QZ8LD1794003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1fa5283f3e2f800e6b7bb0a1702a9d26c1d590e52ee6b4188206a9477f04493. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZ8LD1794005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0e3a301486e5f2cf1e6038434ab6339c589dd9bc856529b45dc5b6b627c8e6f. 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/QZ8LD1794007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f5bcdfa08620ac6befd454360dcaaa018f268f467ae0f7313a73fcacdd86802. 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/QM4DW1891087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc507d151b6c4ea06d01dceb8b757e5b26a26ddb0fb3f24064e93625ff115944a. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZB4J1817768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b3c35a2692cef5927a38b7d04f11f7ef0bb36d6d69c6340a2d7757d53135d03. 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/QZES61946043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe72f653139bf930efc7ad5e4d1ad9ce25b55b6b397f9ad501c07a56c857b47b2. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/QZHN72036157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49675bd1cf2cc2da7ab2b863a024851903a48006cc2dab612f1dc9e21151ca2d. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZHN72036158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ff20bf849cf97c09666325a19f4ba00d4494275c5b9d306cc42ed5fa4b48f87. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/QZHN72036160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9719e9e37647d5a0b1d91ec6ac9b34c42c7fdc3c78d3dcceb158d9bc9bc89836. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T16:27:33Z), 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/QZHN72036164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9f7e48923abe21c81c449ae0bbb9c2031eba44ec71401a1038fa1c23fa1ff0b. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/QZFYY2125303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a45eb3d5ffa0a0183fc74aa1688715da121acddd519e56410dd873f1a878719. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZNWY2115718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x201d25010b68483c2e01d4b3a383fdb4ebf1792828bf033f32ff5d4bbd0ec15c. Chain 2 (Bitcoin): anchored in block 958535 (2026-07-18T09:42:49Z), 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/DEGC62302799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2713f023c366bd47272c230e4d9a20c9b85348b06502db45e7f0e7b7ee418a81. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/DEGC62302800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x646c9181d7af0e70a1676833e29047d7480ed9ac12a5a0757eb310d9eda1c003. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:35:18Z), 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/DEGC62302808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5ec0c163b9daabf34b930fe248e696ba4ea1e9de964de76b499a1e84abb53d0. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/DEGC62402962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5820674381e8b636f540bedebb1cf4bd99d8655de0e6b5d442485f7e3c82681. 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/DEGC62402954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeca9afe79056a9c7adb4a0f0c58635bea8279fab6858dac97787a223b5e76013. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/DEGC62402955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad0473ca7d011adb409a5e13bb6899e8d9b40fa7d53796c4d9d0cb61ba580fb1. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/DEGC62402959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cca622345c1b97f32cc9cce26a27f33574fce78967db920a96239dee21cf2a7. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/DEGC62402960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5ec0c163b9daabf34b930fe248e696ba4ea1e9de964de76b499a1e84abb53d0. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/DEGC62402962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06c291d6251f1a0321266f66c2567c6f78aa6dbd23b545e344614751e23b5985. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZFZ22006981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d14ad1f0f734a8186276eb56530bac51f9c7c4fffe077c09153a4d2d1431da6. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZDA52109819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e8a892c194868306045031d6ce773dc791db94cdba6387bce5da6c9e51effaf. Chain 2 (Bitcoin): anchored in block 957048 (2026-07-07T14:18:56Z), 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/USHM22478189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e4a99ec7477c5a79ac4d7ff9cee768e7556f6508a03de83a67855fd61ab757e. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QMPKX1810997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a0b360968515dc9e77e3c57db98ef7501ba3747bd271807926d6b416d936a02. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QMPKX1811001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e8a892c194868306045031d6ce773dc791db94cdba6387bce5da6c9e51effaf. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USHM22478189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf4bbfbc59ef80fc626f2ebc721cd3c59851762c15489eb4b2676a84af09db35. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T14:48:36Z), 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/QMPKX1810991.
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 0xbad5b203d3c96b870b595549274bc19f4c71ca51f1bace606d21b94470aa30a3. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/DEQ022290756.