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 0xa56c83ab4cd8865e6e474262dee09c935c18b1aa21281ec1ca7b23b301fc001e. Chain 2 (Bitcoin): anchored in block 953817 (2026-06-15T18:10:31Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f84884d8-3fb1-4098-9f22-606a599d0f12.json and https://artists.proofprofile.net/proofs/artist/f84884d8-3fb1-4098-9f22-606a599d0f12.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 0x93bab74c979ea060974248908be61b9c182dbeefc5a3b18c48823bc0e53248e5. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/USASN1900837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x357ab599ecbc3d1484dafbe43bc51ad6a2cf1241f48ab68d40932f4081c146b5. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USASN1900838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e4f54feef25efe59003e46947db308d7a52e6c194019d1a8638b6cac97304d2. 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/USASN1900839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50d343221e44b70df5247489cd1ba7b665958914c7d631c14173f15366fc3e13. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/USASN1900840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7488d2ce2692842e65b992023dee9c1ca5ae8fad1a757b7d3c4a19d68b06022. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USASN1900841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb404642ca5f0f3078d1c15afd0ab840fd9d62a55353d117f2ab00a6775bcd664. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USASN1900843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dbddae0ce843a54501e41fca790501d7b2c16d4c62e9083085cd53112549a9c. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/USASN1900844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8aa686717cc96d51d58df62368a5a9ebb6a7b099bbe925211c230edf7f66b51e. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/USASN1900845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f6316557ec58c608975776396888ece68d6fadb11e91ef1175bb618872deae4. 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/USASN1900846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b26a80d96e9275104b8d6a2c1c2a3b7eac64af99b5cf24255ba91f76e31512c. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/USASN1900847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92fa4ead15d681ac34e9881c5bf7415e3ade657b5bf95200808ea5e2221bd293. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/USASN1900848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57fe3c1e4fa45ece6e641fd07045b990fbefb53d082c7f174f469fef63a7fe6f. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USASN1800643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80697e20025c2068b8104045c674f468199d5dc7ffd2b3b3d0b8327ea24f32fb. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USASN1800644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ac9c10e35f5966e0e2c50724d359b67ac5ef30ca81ea50bf674cdae4c8f0f44. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USASN1800645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ce2ddfd6e04f02f3b48a0d48497fc6e6d095f86f1021926d30dacaf934d7115. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/USASN1800646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54b6f0e24bd9129e9cc0a940fc560d61ec3d92d9c134cb7510d9589d1b07111c. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USASN1800647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ed7847fda608ab0df216c0c89dcf46358c8372ff0fb98f787bf2b35c14b4843. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/USASN1800648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d19db4978125b9c6f2faf6544feab532f42a9b72756e58cb06edd3802305a39. 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/USASN1800649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41927f422d003b64705e0be82833e929b13d08f1b63f1d3cb0e5a0965a9cf878. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USASN1800495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x366a0198b93f463b4b6288a1d838e76d70876c491753c9ae386c3903e6c3ec81. 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/USASN1800496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb39d0f22368590fd2362b20e10920458cb4eb0c21c1cbe4a4c4a2661d40ed89a. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USASN1800497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb690f906680db6dfbc50784c0c84468fa55e2d3be8b4ceb3d1502baa15f73ca8. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USASN1800498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf57bab5beb2f33e2c0cc0add4262009b2ae680f1d17ef57549e1c27b60a8878e. 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/USASN1800499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x638052fe320851dd59d3e0f5fba7d34477bc59d4e1e1743002685a6eb25c8b20. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USASN1800500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x410b2a5b60c8ff9ea5d2d8adf5987b4f340fc7d55d8f7944d13afb04b52e303e. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USASN1800501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18fd45462f7a06358ba041a5d0f25a5bbf2a655dbe8676bad4d11733f935a9c9. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/US9CY1900276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33b1b4168d8c70b79639eae02a2a98c7b7190ed1842761b131cb99ebde1fc4c9. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USASN1900146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6fa41b0fbcf9789e3a1684b0bc5c05289de54592e9eff733b9a73b4d417e1c4. 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/USASN1801186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a56f1c2117b46adfdc12197b7dc35a4ffea3837c963cb79b0d844f385c06af9. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USASN1800234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82e9310244c380bb373d53a33c992695a958364428887c6810f51661d4900fa5. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USASN1800235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x406e58ead81621bd3cc4508b48fb6b2ac131e0eab18480f392c529b00ee1c9cb. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/USASN1800236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14b2a5aff6adcd9c5e0c59afbcdf8efd7ff1f1abc54accc7f9894051b67a44f7. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USASN1800237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59572ffc5db5dd77354d8c0ac5fe86ea5c42af72aeab685e25dd7c45110e422d. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USASN1800238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5957bb8fc22881bdad512122bce9e8d1fb115e1356cb589984f031042c8f4f2. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/USASN2320160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5692e6893c32f37f171ad39941586794bbb3f463cbf4509a0322e74198693049. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USASN2320161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1940acee90597252c0f9a920de22dc967233c172458e83f6bc757b4cc9c723b. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USASN2320163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf3db4f5a9bbd8aa76608151e8d7757225bf2038c89d8d32ad1f512fd352368c. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USASN2320164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4b512f6f78872f88a45f63d820db16e17f714046413e7187d76dfc0fbd88183. Chain 2 (Bitcoin): anchored in block 960259 (2026-07-30T12:51:24Z), 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/USASN2101101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cd6d2f2ba7fbf61e3be820b03fedc1116116b1c0b7981747d46e864d9418dd0. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/USASN2101079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf99b778b98bc0a7cb44c5462c9bca922aec5ccb4d7228553859c9d4438b27603. Chain 2 (Bitcoin): anchored in block 960298 (2026-07-30T19:26:00Z), 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/USASN2101113.