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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 0xe7ec49208149a95f4ee65cda0181d7c3e50aa1605971ff1fe32bfbe1ae828d91. Chain 2 (Bitcoin): anchored in block 953777 (2026-06-15T11:52:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cfc7de9a-6f95-4088-8e82-0380bc211300.json and https://artists.proofprofile.net/proofs/artist/cfc7de9a-6f95-4088-8e82-0380bc211300.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 0x7df7dd7a5ef675b58d15ffbee81a9a209381162504e7a49919bfa5255f858073. 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/GB8MX1000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x623a9f98f331bf96f6b1b661bb2c86e15d0aae1af7fe98681569127bdcea1aae. 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/GB8MX1000002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ab4b0e0486538a7e415be282627191dab5998cb7530b9bb7558fd774e6eff1f. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/GB8MX1000003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a306fcc029f071db68520c97a551afbca331a6a4eee234305d4382451d6e19c. Chain 2 (Bitcoin): anchored in block 959103 (2026-07-22T05:56:21Z), 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/GB8MX1000004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbead524eb7167dd203be9fe1dd042d35c185f8738a6c39c6d333a21e65fb9e9e. 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/GB8MX1000006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9e2f657bf1eb64efbf0623115d95bb2687b25322d5e1a135da85a39e8dde41e. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/GB8MX1010001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ff79f15b46c75487578d659d3ce604c47e7176197fea46b1bc1aa120017af00. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/GB8MX1010002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe976b9d4c39ce34742e7c02a86a66ccd9d8c7e69d1fc77df82d31b5d39ddc7d6. 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/GB8MX1010003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88c9e17771fa0e62e697faf80a7073f0b43385ce2314c3511b1d1a47ccf9e847. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/GB8MX1010004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d11109b7cf7daa55be3459ec619b0123f00db5eb48f9f112ae59055010d2094. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/GB8MX1010006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd88838650b3d9b656d4dfede402de5184042c0e71eee805cf711649946cc0651. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/GB8MX1010010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64304ab2be6b14d4d30d60fd5bd0d8e5cb33af91680631c855b2ef93ccb14978. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/GB8MX1000035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cd71b4b14b882efd9d3c3b88b6e2c592492be59e1b0b79ac8d7d1deaabd2b7d. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/GB8MX1000036.