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 0x9386cd9115ffd90a4a0c5c663133724c7f6ee83686c80d15126b2d0764ae2448. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2a1d54e3-8f8c-436b-b7ea-7d91d492b33a.json and https://artists.proofprofile.net/proofs/artist/2a1d54e3-8f8c-436b-b7ea-7d91d492b33a.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 0x4e88e57ceb2cc3aad4004ff956474e8c6c765982348c29a5d7dba31cce53bb28. 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/JPD832400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f741dc339adc316dc2eaa8546e8350e2adfb080b232825ede86e4e81f8b6f24. 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/JPD832400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcef36b771c0ed52a8c8e2705e35fa4bdaeabbd837bd3e408349bf574dff0e810. 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/JPD832400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6af2f150804fad17b65e4e71e3724ae509dccbb89ad413fbf7c5576c279e345. 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/JPD832400011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ba3d6e4645a0e2fb1dbb1dc5a9e22dfbdd2aa0b5d362fcca29a242bdec6cd8e. 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/JPD832400012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc019a180b8b9e7ea7bc44178b690659c8ed6b546e210d5db6bf20ee9d9ad0be5. 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/JPD832400014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb04f9a0f5f55ada8daf59e29b50d6abe91b1bd98fb1aef064fff6aefd00e9496. 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/JPD832400016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1baf4c8fc154a62960bddccb655957643425ff311504dc8ebd92d88562f4c759. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/JPD832400013.
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 0x08cd2773286d234fb0b88b42c86b4eb4a56a778c8a4df15a6cafa8b6df26d919. 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/JPD831900008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd7ab453b97ce7bb95c630b83e42e9be5e414969d87bed2f3d9e71c68909bc9b. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/JPD831900009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5548fb720cc4ab6b6d5116f4214e026989604807580325a3641ece87ad3f3b3f. 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/JPD831900014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bee11954d3452c1ace1f9a63fdb0580745c9356e2189a2c071d85bf46884d60. 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/JPD831900016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab67b2ae4a2d389aa95cc1254c1069140a05cfff24ecca8f7faa1b73a8f91ad9. Chain 2 (Bitcoin): anchored in block 957012 (2026-07-07T08:27:05Z), 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/JPD831900017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8f4dc383d50aaf9076b0e19d3575d3eac5ed3cbc12e179add946d32493018a4. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/JPD831900010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x299871cf337788de24aebe61252f2aec0cb1ea1920f6aad326fe94878f7978d8. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/JPD831900011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3c54cfac30d6d35275613b4b40f56f7d2ddf994917b27350ea2febe627e7118. 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/JPD831900012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0187c1348581e498fedf82de88cb3b7649f89d3e13d5bad33a1dc102f4e8569. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/JPD831900013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe39582158f82fb109b720e48802cb729f27a029cc26d2cf7cc1285e56e8eccd2. 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/JPD831900015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0a4e7068c247ff66f80bec4ec5cddca73352cb2909b225840dd95e8a2c25a47. 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/JPD831500009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x693ed66632091dff0bb963a8363ec36720ee7148987752b765b3e1aef14ff229. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/JPD831500010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6627da38e1e1b4312a1f485246a09da2012290959f542104102d197762504db0. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/JPD831500011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x208c198f96f8acbb6b8fb172f1bfee954a08b3f40a3f9449b0ff4cc34bbc2576. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/JPD831500012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5681df8418b7b16948220f3d2ee9e5dc1ebee7ac7690fa50267d6615d944689c. 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/JPD831500015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd22f691c930087f0dec30a5a1e852bb704c1dc20b0dc7161ad29a56bc6c9b40c. 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/JPD831500016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x800353655ecb23b8d5e8ffe89110bf9edc7384f781b70b8e18586ed7e4e7c077. 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/JPD831500018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd955b54e341e34e9812ba4dcf32cfe28cdf8058ceea4ff8962a86e8e6d183f4b. 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/JPD831500013.