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 0xd9ff2b457133f36f868143427f40ac18a260f582905d621daa722be3f156d638. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/59c5e90b-061a-4910-ae3d-a719ef0cfc52.json and https://artists.proofprofile.net/proofs/artist/59c5e90b-061a-4910-ae3d-a719ef0cfc52.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 0x72f9016eb288f8114f8e58addb6dec4d0f813850348d24b713b2f175f79b5d50. 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/QZZ8A2429251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe29aa64014c60151db06701d30d18ec608b554c3bf6ae49453191347faaf51cc. 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/QZZ8A2429310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b6f66458f7bc4cb7cb91016cccddbb0dc416ef751b452c535731cac07e587ae. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T13:22:35Z), 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/QZZ8A2429311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6cb4ae40bd25c43715bc57c42304530b4007e98aa4f0b472cbef48c00570b21. 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/QZZ8A2429313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc344adc10979eefb4b52fe3ab367f498a979cfe3150e5e55ebe31bd94859572c. 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/QZZ8A2429314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fb6e6403dab91f6c9763d5204e9a909012b2311f70d899e701979a60b1738b0. 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/QZZ8A2429316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04dbd827ac679e2bd3d17ce8886021ec63b80712a0ef2f90693b46fe9a65b0cc. 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/QZZ8A2429320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5709ad63ea2f2f5b3873a34a47632dad9f312511d970ef5c875abcbbcc2e7f90. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/QZZ8A2429250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc84f14cc93417010ee34865570afca0d6cc627aa44cf05d08c3d66311b326522. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QZZ8A2429224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x573c88f1adcb8a0eb8775c1d3b3bb8750118fc065b3aefcdd7751de7f407c4cb. Chain 2 (Bitcoin): anchored in block 956859 (2026-07-06T01:42:12Z), 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/QZZ8A2429227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0b48e0fa13ab07d7c9339a57c29bbfa7ae283a4e479edb1068b69efad189d05. Chain 2 (Bitcoin): anchored in block 958678 (2026-07-19T05:59:57Z), 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/QZZ8A2429234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bc828b477e77c895415eca8c878d3b2ddcca9e5a52e7fbb73bb0cc9edae135b. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/QZZ8A2429235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0433c7f6ca7b759f9b9dea8c78fa93746c3e3625e46dbc72740ed5bb7d515353. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/QZZ8A2429236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddf2e950ea8725975aea9ee31c3fa797625af16f3188ac33512b4c786acce73d. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/QZZ8A2429238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e9265e1cbd56a244ce85f8d8e9634e15268715835d16155b7027857a222148e. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/QZZ8A2429242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc49478b5f5e579876d7297da0e81815d57826367bbf085dc9e499521bda513af. 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/QZZ8A2429244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3440ab7a19694f96bae2314ec16ef7332eb64d2a74a8391714bcb2613c2d576. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/QZZ8A2429245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac5f13a72a2c98ef6bc1b7134a9639a8443ffab82a33e60e3af8aa5ae72a7367. Chain 2 (Bitcoin): anchored in block 959015 (2026-07-21T13:52:01Z), 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/QZZ8A2429247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb9c3ea7f5ce4c45c340d2595b31dc7e2ddab26750ea555a10f8bc9a7fa5460c. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/QZZ8A2429249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe97994c59e737206c2356b3cda9d4cb8016367bc031aa4f97ba3534fd6f1513e. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/QZZ8A2429254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf49a1874b7f30df2c805e818d37aa02a44b42134651c3f5b8dfabcfbeff3e893. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/QZZ8A2429255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd90e489d94535500881682ad926db26687caff0dbef44a0bcd79cd578098062. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/QZZ8A2429258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd28b4a9fc0bf7c6e38b7bd9feedcd7e5961f70dc1f8766c79d70e0386dfca2a. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/QZZ8A2429261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43ccdeeea5100d5337f3905f636a1326e9e66236f9d98c16fcba10537545335a. 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/QZZ8A2429272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf9c02484ad8f33e814a26842c64e16e687a5635f905929c5032203141f04bef. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/QZZ8A2429276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x186bbb1aed8a2e89a823fe0ac6c977420a918531474e9091717732320d11b82d. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/QZZ8A2429284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7439e7ebc717e908d44232d4b08b8fb75f06bd5cf7c0cf462b3ec6de4625c66a. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZZ8A2429291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0649b8558e976be364e2720fdd4afa0b489ffa814adebb955d8d27e3e595578c. 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/QZZ8A2429295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed13fe4da0eac7b95126109af526784ec7d2c00a2fce5e81876d143158cf6fb3. 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/QZZ8A2429296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1dd8f7a20e4b1b0c53bfc26ff4d0103b24789d5e1e81c9a73689c8c99e99619. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T12:54:58Z), 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/QZZ8A2429297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x810f6aa6ff8554d510c1e0825f1c8b59dba29ab00fdbaf5fec12091b3c775098. 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/QZZ8A2429305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc21fa77c66257ffd68d6149cf737ea275b86930ff9b5079c997fb43f4037af28. 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/QZZ8A2429306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16f3b2cd072c65e77ca5e275758f5ab27ca578fd90cb963f56c82c8f6255f88e. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/GBWUL2541219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf801e8e5343603a4ab2129a465b63960c54902a3cdad094fe1b81413a4605ba7. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/GBWUL2541232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1563e8ccddfeb2deaa9823e7399c4df6da006108a53bfbb4790d6e55bf32bf4f. 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/GBWUL2541243.