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 0x93f9f0480f41354497fc3d3cf0122c86541d3713ec46f703aa1c4c69d59a7065. 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/aa1b1dd9-612f-4219-9a9e-ae4b38cc3336.json and https://artists.proofprofile.net/proofs/artist/aa1b1dd9-612f-4219-9a9e-ae4b38cc3336.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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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 0x33b7b2d6185e2d3e7972773028f7b87f06ecda07087313a3b585ee7b4956cc27. Chain 2 (Bitcoin): anchored in block 958378 (2026-07-17T06:45:39Z), 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/FR59R2241332.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x189a4e9f7215a6fb5c5b34775da10d43294bc5ee521439ea84174914d22e4631. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/INS7K2100133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc8b9ddb5644932405dd3f4010ea218dd5a56a9d5602db6a6ca0c965f56ad537. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), 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/INS7K2100135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb2052fe1c1c3a5d0a1281d5b18c749d78a5532fe1193445a2cb22c29cc75b34. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/INS7K2200186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ef2fc398c3dfd98d4172f82ff6e73501f79f36f9c98b537767a88e96e70d87b. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/INS7K2200188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15af334727cfdc1bcf2afb6ea145a6c005d198612cf8931924aeafb7116e42a2. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/DGA072470311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4869739854274f95c54f62fdeee18dca0e1e6b072d868f5f8fc3f8d1dcb5812. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/DGA072470320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a7339a61fbce93972d0fc8cd3db896f396896c2292476344d823fe21fa90de8. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/FRX282391701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e4769bf83cfd40119b9056b54331b49b5c477ad29f9cc3c205da86900d8c0d9. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/INV672100248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6d411fb015efa780ac8445f146e12f98cb407fe6fd12a94c3df89186e784a42. 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/FRX872323179.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc8b9ddb5644932405dd3f4010ea218dd5a56a9d5602db6a6ca0c965f56ad537. Chain 2 (Bitcoin): anchored in block 958051 (2026-07-14T19:14:42Z), 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/INS7K2100135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66910f7586842fbe4a273d2887b29ed20653f405514b8d61ce4331d0609e4b0d. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/INS7K2100147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa09154144218cdb4bc77d3db74d8a68d67846d35b561af24052b3fbadf95e3eb. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T07:18:08Z), 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/INS7K2100159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb24d81a6e9ca85fc94ad8486a185a6cfa195421026d04b07c7856db2abaccc5b. 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/INS7K2100177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ce3ef6744b62a5b53799f48449be4fadf0c987ba13bae63b8b9a94afca194a6. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/INS7K2200184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb2052fe1c1c3a5d0a1281d5b18c749d78a5532fe1193445a2cb22c29cc75b34. 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/INS7K2200186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ef2fc398c3dfd98d4172f82ff6e73501f79f36f9c98b537767a88e96e70d87b. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T08:53:48Z), 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/INS7K2200188.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1762fb6280288948d2453721bf894d52f5a3812fd912908e5130b0786d12c2c. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T18:45:44Z), 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/DGA0M2426029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb935b320c52ab1011fb92831ba7e349296b7605928cedbeca4773f71fdd1b10. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), 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/FR10S2593742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd6cdf3fe5964bca14762a8fe9d5e11c23b48927102841074854ed21db9d715b. 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/INT102405588.