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 0x6c328406e0681fb464f9639e4218619d23e0a3d22d03039c69fc55b342184e77. 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/6b86f07a-2a70-421f-beda-b5fae9ae5c94.json and https://artists.proofprofile.net/proofs/artist/6b86f07a-2a70-421f-beda-b5fae9ae5c94.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 0x35ae42d0b9c3147e24bc05c1b7960161e9b0ac2539d5a914675371185cfffc8d. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/IL1012402330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe90b9fa2604d2e3ad0b611ff352a95ca629a233ffce450695af05cc06a7321c. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/IL1012402331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe363ed09068ec701b9fa26af4cca0cd8edeeab6bbeb24fc3f0b7a490939b6ef9. 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/IL1012402332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1bc2ceb6f4f0e2db9ff0c833366a57b1a94925c4e037d9cbedbfb7974592587. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/IL1012402334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87a081751de5de66191ff9c89293162d54b06553c5d22b6fd55c078f65636042. 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/IL1012402337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x168df20e2b6479ec149d747867bf71f443093215742a115eda2a8e8f5a222ca8. 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/IL1012402471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52322cf99ae52c3a7f0817f075add59604c8130c6f202a755d4152c28a93f2fa. 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/IL1012402510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35ae42d0b9c3147e24bc05c1b7960161e9b0ac2539d5a914675371185cfffc8d. 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/IL1012402330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe90b9fa2604d2e3ad0b611ff352a95ca629a233ffce450695af05cc06a7321c. 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/IL1012402331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe363ed09068ec701b9fa26af4cca0cd8edeeab6bbeb24fc3f0b7a490939b6ef9. 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/IL1012402332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4549ee554688254a4d41c943c914ff87d192106a9fb4bdf841025a554b656989. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/IL1012402333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1bc2ceb6f4f0e2db9ff0c833366a57b1a94925c4e037d9cbedbfb7974592587. 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/IL1012402334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95b03a0842583fbf41cbc4b55ad925facab88364366cc644cca6888e0ef13836. Chain 2 (Bitcoin): anchored in block 958401 (2026-07-17T11:10:25Z), 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/IL1012402335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1807165139b06b49a97d88eab170e83648b729da216f4a383aab6a053a71c49f. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/IL1012402336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87a081751de5de66191ff9c89293162d54b06553c5d22b6fd55c078f65636042. 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/IL1012402337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x168df20e2b6479ec149d747867bf71f443093215742a115eda2a8e8f5a222ca8. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/IL1012402471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8a64e467798cb3dd6c0cf5243e1e6f61b5044dcc79e5198766fc704e6c71a62. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/IL1012402472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a7606388fa159ae5b3cdbc87f520b05a36c496695c97bc3497fc6c8bf72a76a. 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/IL1012402473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49c3d9509e3bca7102f262a1c17255db722ee8cedfbd16c63f2ab7ae77edde7a. 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/IL1012402474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd594a37e0dcab3376c67d04d1f59a775cb35abb8f11b644d539c30b8c29c97a9. 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/IL1012402475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe00448bdd467139f646ea81ef41717766663759c1cbc2bb7a7b94938e559bcb9. 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/IL1012402507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3278bfb337aed5480e2f8fea78d5add597c1596725fed644669804d126348dd. 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/IL1012402508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22ba4cd195da5996bbbe60e0660214e2496292c9f617b275826b0a72e5989f2f. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/IL1012402509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52322cf99ae52c3a7f0817f075add59604c8130c6f202a755d4152c28a93f2fa. 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/IL1012402510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69c31aeb10ec1f66487f43f8a59a4a4e555698756551a85155124b5cac798d78. Chain 2 (Bitcoin): anchored in block 958380 (2026-07-17T07:07:02Z), 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/IL1012402511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec5e107d4a23bc438c07f63c01fe9d0e870cc194d12262a7dc1d5c8d21abe8e0. 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/IL1012402518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51c55ab6491d75308d35cc1667300d5ad88a2030cff34fafb0b862f3a31bca87. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/IL1012402519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fcfc79b4c7d60c5b15c2d0d24ae54a401887cc5301eb6b82ccf0b448de52bae. 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/IL1012402520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf52b5fa1c04cefc59b93fdb7550a17e9fd1b156a838066b9171801f807f492e4. 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/IL1012402521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35bb64d287ab534b3145e6b89e50c61e7ec6be3aecf80b14cd75e5eb061efd55. 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/IL1012402522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc806f92b5c7cfe08d36dd96676f15f0008c92fc79dcc831d4aceb1c3d4d8ddb6. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/IL1012402523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1434bfd92a643874645f1b76a4e11f3e05f75acce1cc0b9710691e6f615eff89. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/IL1012402530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb43c763e5ab6b2e446917ad4bb7888ea10e05b11c4816765fcd863d2b1473ff4. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/IL1012402531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a571122364d725be37839939486d629be518155415287df6652949dde29722e. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/IL1012402532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd5fb7085e6d37ac824fdf488971d6ab8ac006709738062c4e1863d65c68ff9d. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/IL1012402533.