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 0xa14671874d6884051d2f24492d0f9370a3d4e8d96f93d270ed85a0433f5c3018. 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/f221f530-a4ab-4171-9518-c1f4c96f8c17.json and https://artists.proofprofile.net/proofs/artist/f221f530-a4ab-4171-9518-c1f4c96f8c17.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 0xac93aa111bfa79c273037cad890eb2c1d24d9faa3a0c0a4d08d71cba66b1f9fc. 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/USDY41709716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd5a427ed8ae332b43c94067614b24804171fc318e17386c565c37d45307046b. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/USDY41709717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca2736d81e3c0c716a78adf83c7bad853a68763cba4510f31a5477f10892f5b0. 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/USDY41709718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e8dff7387ab062906ea42c9bbd0ce50a22d1c7620df8dc02bbd44e159cb1dec. Chain 2 (Bitcoin): anchored in block 958122 (2026-07-15T08:02:29Z), 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/USCGH1620956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55c8475544596e040da6a3e330da9eecfb201da5c30b7ae7cb8e11d06b08653e. Chain 2 (Bitcoin): anchored in block 958667 (2026-07-19T05:04:54Z), 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/USCGH1620957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8af35b9c58872bb00e62086148bbe4e6a8b059069ff0bb806f4ed8bd221653c. 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/USCGH1620958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedd8145e9ffcecbdfcc164ac29d5bf933fb64ae4256ab491bec7a007c6f97f53. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/USCGH1620959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b2daaa8e24b7d881a64cdbd32f6eeae5c81ca6400b3ad43b380dd54108684c6. 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/USHM81513517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab21d4f5158f480f790c49ff9aacab941069b5acb05642d69f17ad18a712f480. 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/USHM81513518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2d0c69e116ff102654ed1fdbd3c1d6b8ba9e514b5e038767a977e61a53c45c4. 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/USHM81513519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cd2eea25bb97501c5a8cb18116df07581e650986d3e014bcd15f9c304b045eb. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/USHM81513520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10c2adc7ffcd7156f1d4fdc56dc50e7e6c4a112a303318712a9100faa1af25bb. 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/USHM81513521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98715214e979819ebd3c8275b83cab3a0ccc112a82a40b43979bc05b1240ca54. 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/USHM81513522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd58e5d9b67ca3c08a6140e4d7e35df7019a3c8f34ee1e10db4a45e5a7286d39b. 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/USHM81513525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf0bfde18478a1431eb32648d5e1d6f1b2f2cffbaf7ad5876504864eb81420f9. Chain 2 (Bitcoin): anchored in block 957835 (2026-07-13T09:48:24Z), 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/USDY41709723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90c269d4a8448f3578f2191a6caf1eb24dac0fa652eab8ed0af7204a4f335f7f. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T10:57:35Z), 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/USDY41709725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef1bcf49504d1a7aaf9f42155e5ab0208c46f9637802eacf63dfa49c911ed11e. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/USDY41709726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed1cd26a01525139d81c166f35baa993c6f16b352df39eb86d9627933076cc41. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/USDY41709727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x962470f160eea685ebeb97691cd0d7824710c5fdd1429ee893ca19c1e4834a0e. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/USDY41709729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fad3c4d2bef83e8743b3b61a3c248ba1f53d242465274864172fb058b7e0ab5. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/USDY41709730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c043711d8eab1df2aad1b68d54102d1b90d8be886b5315f8e7d5c6c80d4faca. 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/USDY41709731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c9a802b4d078e578ddc313fc6fbd94aa11754b96a3025df81e7e946965f58fb. 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/USL4R2058843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb731fd43016990e891155dab6d454e47d037820c17d59149528e6374642137ad. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/USDY42433544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7360aeddc92c02909cb0018a4cb9b86ffbc4d6db8a39f123ef215a3f22d8bbf3. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/QT3TB2402693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x176f66a24da3319b4a85c71199e325cef0be6f66f8085b49497537f2b666ba48. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/USCGJ2580505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d432e920c2cc351b2515e346c7a46e71eec53b58071362249466125cd936c85. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/USCGJ2580506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ae6f85f3c8ee11e56aa6f7c2da3cec958c1e8cbbde1b248f3d5b80a503fd701. 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/USCGJ2580507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f07315df009dc2fe58aff4866322a2587ded8b57ede18c001290532b97da30a. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/USCGJ2580509.