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 0x43112e4c92613dbe076d78539c7c899f63807918b7ac5c68b281068b4c329eba. Chain 2 (Bitcoin): anchored in block 953741 (2026-06-15T04:44:49Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a0876d5f-b752-4a8a-b161-ed514202136d.json and https://artists.proofprofile.net/proofs/artist/a0876d5f-b752-4a8a-b161-ed514202136d.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 0xfe9d9896fe2277e4b345e90a7836e31253444789acf289f941a222ad60906174. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/QZS672419359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe779ef58b901688bbf8349e283fb9abf4a855f6b8fcbd30d3806f6f92f148a70. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/QZS642497327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x405ce4465ebadd647f45d8c60a90c3fd7d8a04a09862bc885111418027758ca6. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZMHK2455584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c064ab85223edc14f2c5bb6771fff8b0448faebe98ab07e6acaea3fa9e1eb94. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T15:54:27Z), 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/QZS672443924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa689c6672ba9e22873c30b6ea9d103e08ff3456d5b64d4b2a9ad02383353e3dc. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZMHM2460528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c8426ea280230180d580af399ca7bd908a3b67aed62d2b5513336bf9953d160. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/QZMHM2486573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x037f9751c7d5e3478958edac0c165937436d262f735f074dad419fa891998752. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/QZMHL2457394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe445cd8cb24dca080379100fe502a75e2b12c01c54c48598729ad1f895209204. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/QZS652475775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c3626a40d850e5ca32aa516569206bb6f4f076b6b1331f56c4405a123bc1a7b. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZS672456546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ca29919b4457c979758833831748b6736c526e84111e68e595223d14da75b58. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:09:59Z), 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/QZS662485630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0368c9e74481b20f16a932d45b24902c65c26578d09fb4888dcba9632b8f2821. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/QZMHK2444069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92d7bcee61bc7a41fec891342395520c2e6cd5582a6ac04495dbbc05b9e9cfec. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:54:27Z), 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/QZS642480752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39134e4bf2151e0fdf03b78b9affc6b5fe5f2bcf409cc0b5d505d5f183f5656c. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZS672486058.