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 0x9fe8f9133a2153ba057a61688c896487e1030419d2b5000da9bb25c73e3a12aa. 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/702ce84a-a910-4b64-a855-c94b1be05075.json and https://artists.proofprofile.net/proofs/artist/702ce84a-a910-4b64-a855-c94b1be05075.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 0xde1aa4cab20aa8271f3aab05a33be4910bae012e04bb38b05d7072fea7f9f634. Chain 2 (Bitcoin): anchored in block 958733 (2026-07-19T12:51:21Z), 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/QZPLR2197714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe435a1cc57fabf76f1084ba42a69d993c434606b7e5c669452a616a57c510674. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/QZPLR2197715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6886e3e34f1e1b4aa762db5c359d60adedb6f5f84759c181f4f661cc80f71620. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/QZPLR2197716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5224222a8cbbedc937e6cff6ab97a83815110ec170756dd65e47787f48314d52. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/QZPLR2197719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a77ec20f1e8d3d7395bc6d8aefb45d10276c066c17acb404271a80b018865ce. 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/QZPLR2197720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x719ec022ad163e6be7126c60ad88452c116b9f90fc60109efc0d221c4d64ae2c. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZPLR2197722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e2b25b3b8f695ffd498994359451121aa7adb14c2f6374c9dd4dce44f529ee6. 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/FRR642400105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69c5cfde4e3c03c64cc6e56a56976605b5c8dbc574306ba0b9d41622d07dc1fb. 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/FRR642400104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e2b25b3b8f695ffd498994359451121aa7adb14c2f6374c9dd4dce44f529ee6. 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/FRR642400105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1f6ec9cc058083059cfa9122b0509d7174abe3937699dd50046e4f9d2404dbd. 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/FRR642400106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ad555c4fc067bdc578a7f6c021cd047a190b69d6ee1cf307209e2073f34bc8b. 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/FRR642400107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b69cfd219f8bab55638432a798e785d9971bb0d14142e9ec193c2f4f75ab926. 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/FRR642400102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5209e3a7cd21a3919fe26f37bebb7e0fe10b6013573230cc419dd9dc1941f935. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/FRR642400108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81ea796b4c08c33c4f08d067eb3b35148e320b54be02a507af86d85c3f8ca506. 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/FRR642400109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80b86bf01f681024ab0c0f4e7e1caf7167feb105f3c7ecbcf48f43bb50ac4397. 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/FRR642400110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe121259b066f0e30f6ca7c7cff1cd6f52c72f5bd728fe4fe0db529de2ddd6bce. 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/FRR642400111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x883528661aca50d4126e9fb8ee2d82d074050044b8a9446d5144b4345e7df731. 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/FRR642400113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1577dccf237417b057d6ea0e98ccedc9fda538a708f4619bba5838cb7654c864. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZZ792455836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bc2ee28816224c86e15c7cb7bde42360cfc6b3b225e436fcf6c9f656e6e17c1. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T08:40:32Z), 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/QZZ792455837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf84e553f0dfd14acd035d691c3e96739f2c1096f06bad3ab93b51f6839c15534. 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/QZZ792455838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ede993f65177b2d28d7231824714ac2b9435a6febcf7d8fdfe1c806c009b591. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZZ792455839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb329f6115093600c93be47bd1cf36c7b127b66a668dabebecc4760909cbb3d82. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/QZZ792455840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1577dccf237417b057d6ea0e98ccedc9fda538a708f4619bba5838cb7654c864. 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/QZZ792455836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bc2ee28816224c86e15c7cb7bde42360cfc6b3b225e436fcf6c9f656e6e17c1. Chain 2 (Bitcoin): anchored in block 958785 (2026-07-19T21:40:06Z), 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/QZZ792455837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf84e553f0dfd14acd035d691c3e96739f2c1096f06bad3ab93b51f6839c15534. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/QZZ792455838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ede993f65177b2d28d7231824714ac2b9435a6febcf7d8fdfe1c806c009b591. 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/QZZ792455839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb329f6115093600c93be47bd1cf36c7b127b66a668dabebecc4760909cbb3d82. 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/QZZ792455840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedd0f1fcb8607e9f8f69dcbf9a88b2248f4640c3934f494fad703cf3ab3f9e47. 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/CH6542437299.