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 0xc966b462137bda9d758a3104e11edfc53002d1d2ef3f53e1c8d087a8be99ac74. Chain 2 (Bitcoin): anchored in block 953786 (2026-06-15T12:56:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d93e41e8-b1b2-4c3f-a1cd-3af1a19efa33.json and https://artists.proofprofile.net/proofs/artist/d93e41e8-b1b2-4c3f-a1cd-3af1a19efa33.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 0x910cf8371d749421b1bb685b12c08a35b92fbf5eda1cc2270374b1bde7d6af93. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-22T00:46:44Z), 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/ES47F2401458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa473b08cc6910cb84676ea3105abdb65e4fb2acad68cab25a5d01e8a1e78f01. 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/ES47F2401459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7deccf90dcfa55a7655156c45f5dffcbfb06c03940eb4dffb35be8428e739904. 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/US3DF2497559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7094e576c998b4ad4ad3d235251e8bc21949053e19f178cb19da319181aa0d48. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/US3DF2497561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdeaa771406c20ae40423a80579a2267205f08c8013a9c53ac97c7dff6a1e76a1. 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/US3DF2497562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ee8cb65ccbba0c974d16ec3429b6b41fbf69263abe631a25304df76811f35ef. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/US3DF2497565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf463293c22552c66b52a783eae0ab55556f6804c28d18c6a3b3c9974fc341417. 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/ES47F2401334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa76cf16b58fb69066e391f0036462c1babcf1725013782f673c1b5b3f5620b0. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ESA112432220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6200c1866be4c6fd142b8cd773506c8a08f39a590b8ff22fefbac978ec9c9d9. 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/ES47F2401228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b30b23a6f9058bc280ce07b425ed1a127b531f0edc469037bfc1003abf511b1. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/US3DF2497563.
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 0xa490b8b95f87830e0ebcb48d8af940786db382c2c80c714ac7d047a44a6e0455. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/ES47F2401461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d7c7391858f1b5109f24bc91bbc0f7f3f4b2df81f4d30d93cdc06284d1d9297. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/US3DF2497558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cdd952b8c59f867dcb1bbf7ea470b5cc72c649f6af682b1bfcaea5ec1814863. 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/US3DF2497564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97b054d653b7bf9e0e3d8dccda51ba8e24f69b17efe15c52a05ee32b8c6aea17. Chain 2 (Bitcoin): anchored in block 960277 (2026-07-30T16:10:47Z), 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/US3DF2497566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf32fadc9498ee339cd8515212951312cf314d84a7b4ceee9a2843556bf21f5b6. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/ES47F2401333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafe01ec9970909a17be73cb4b37e72336965e93793032070d59ce6cb2bfd343d. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/ES47F2401335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ca4b6eff41c4b4530108be23303739d1a429ccad46c9a678df11de16e26f7b4. 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/ES47F2401336.