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 0x0203977890ae321bd440243e3f90afa11785824131bed7f0908543cb088183db. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/65261e01-699e-4a02-acab-222e57bdb8ca.json and https://artists.proofprofile.net/proofs/artist/65261e01-699e-4a02-acab-222e57bdb8ca.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 0x01aa90bf40ca9432a6baf3816193d96c231a3f71c4d6d43b8dd8f43938a679ec. 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/USHM22337239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x660fca3aa70d3c344b17e634456ca0d2095400f90a32a60753cc63fa4a604244. 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/USHM81624255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7af75bdb5c40d3b125b41cf6272cbb849a9d512aba32b57529ac374f4ce3ff0d. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USHM81624257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd71b80298160a8c4da0edb0c26f537bb060b3d44ce88e69d51c8009c4e1187df. Chain 2 (Bitcoin): anchored in block 960268 (2026-07-30T14:53:07Z), 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/USHM81624249.
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 0x91d21a8525ae594e1df6feb41380b0eb3677a33aaaf95e2e9010c6386b4a8d05. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/USHM81624250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94a3b493e0d2b11db3e2d5f3c2264c533461de2799a2f9f76becd51084726c97. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/USHM81624251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29a0a62496779528ca06d55fd1ce21f2cb707d36b845efb7414a6fabea3c1198. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/USHM81624252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd1697e309fdb541990ee397c2cf9902f99e82ffd769c1271c3ca3f7701bc4c2. 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/USHM81624253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeffa30b264d8fc7019b36561697350888014b6ebd10f2c42c2f91db9ed6cd2b6. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/USHM81624254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb86a6d632c55960a1d675bb5b36399b11af14b6b9184675824eaaa9641125d3b. Chain 2 (Bitcoin): anchored in block 960422 (2026-07-31T15:27:29Z), 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/USHM81624256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc566c17eed3d20cd72ef92c83f8468cf5402d225092cdd89f398553f9a238a62. 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/USCGH1874158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe08956b628d19ce400c4279e72e9fbacd43603157a8fc8eae4556fbe823203fa. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USCGH1874159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb0d6c118830f250ce2b36fe460aa89d37027fd03ea18005c8e570015835124b. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USCGH1874160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x529593962413ca46e824d21f2dcdba66b252683d66bd1f735d17f502814a1967. 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/USCGH1874162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb1d8dbde5f83cd5d3f1a10c61be4f2184eb429e7898cbd9e3506803c4a5d705. 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/USCGH1874163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c5fb7c5b94a54a2b15aef23c350b472eaecbec48dddf9f367affd33bef96b2c. 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/USCGH1874164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x679255cebde7d17e7acb917dd8ee15517731adb7758c18c6a7cbe05f87070007. 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/USCGH1874166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0025d88092c06ce6e4730a6bdc3a859a01a1ebb451278d672fb4c1beb1e12cae. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T17:53:30Z), 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/USCGH1874161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9de025a8bd496f764f47b85b9e4401d03cff242378818c7998ff55b60a48a13. 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/USCGH1874165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e6672b10845a16d69891657b3d369a0422e546fcb702f49f52efd3d73595cb6. 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/USCGH1874167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x956931f4569bcafa8ea6e49ff737d3bc4433203a88d26e5ef3b5f8fe70eb5e9f. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GBKPL2029269.