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 0xfa9c92015d7339fb23cccce0a13e4972c3a2672c0cc995450583a109d4eb8c1e. 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/9915ba92-32b9-473b-9d0f-1c9762663dad.json and https://artists.proofprofile.net/proofs/artist/9915ba92-32b9-473b-9d0f-1c9762663dad.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 0x238f843f155e5ea0782ca933a619f8511233aed8fc078535daced82223200b3b. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/TR0010700132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec1ad0ad3d92be842a6037e1f9577355c0643e9a2f7b26dd8b5e67b7d52af36b. Chain 2 (Bitcoin): anchored in block 958579 (2026-07-18T16:26:17Z), 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/TR0361300157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1754a9294e5670b26d39cca0225404ba64c58b5e70e53a1d4b7777c2bba31f97. 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/TR0361300150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f05d8d874be2caf3d96defeb8c0739ac4fda8251a326604525e1736ae484de2. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/TR0361300156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ac6a79ce4234abab5441293a37c1d360b077830654a0a5b5a0fac8b13421611. Chain 2 (Bitcoin): anchored in block 958529 (2026-07-18T09:21:41Z), 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/TR0361300159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x165aae705188e009ae04192d409ba774d1bb096187d79bb1ce7145bd50f53c47. 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/TR0361300148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e8cbf37a2938bd00d391fd843ad6ed141fbdeb28598ba5a3a78b60c92a9a6db. 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/TR0361300160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a89555f6481a320443be89b26e8eafcb83f6e18d7f90fbc5d9a3dfdf02527b0. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T19:26:13Z), 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/TR0361300152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ccab54bf13b18905261dc4da0a63b644043c64739dbd691d6744bbc17e76ce3. 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/TRBDI1800237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde7945ff46bba14cfd0f5228ee0e20d2d2cc2fa5a0147ee66563460af6258171. Chain 2 (Bitcoin): anchored in block 958529 (2026-07-18T09:21:41Z), 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/TRBDI1800241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x843749ded496212cb1e4c9fc6c9c8410c778de105e11e0af87d73bc34a979382. 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/TRBDI1800249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x580dd619d6d0a0f513efb6881e1b1041af28b9c958403d386fab1ea43f3b0fa2. 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/TRBGV2000832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7d29d7f365be488c0f151f8316a06ac13d00d4801341c9305829abcdbd0c63a. 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/TR7341900032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c4ba0ea7f04d9769b091a041aeb091809b3d0fda4ec0edea4c182e3aabdabb0. 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/TR7341900034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcbcdeb2ad10811c1c675b300944754eb2e9bec698b1f6b988ee64f3d3d55fbc. Chain 2 (Bitcoin): anchored in block 959073 (2026-07-21T23:25:37Z), 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/TR7341900035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7f82e84e5ee6adfb4aa00be70d5538ab7bb42ecd6c7457398ed3d3a413db74f. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/TR7341900037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21e25cdbb37a81ecdbb5dff37a485f53cdd04713a37474d89b19b900952caa94. 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/TR7341900040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e4191fde19a1f05e001fe92ada35c842e534645c7b09bd74835a19f39a400a3. 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/TRBGV2000823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1190af5ca01ca9e2dacb839c8efea5bda83c94a0bf9761e5562af99d0235f78d. 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/FR10S2399746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19f84667991889b49eaa00a0e798635af04d70ae942b1275dcad43f5d25025cd. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/TRBGV2000834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68d8a2d6e20f0c99b0681c69ddee4d5396efadfcb356ec74d78ce1a36117cf08. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/FR2X42154666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c50691c05525bb95eaa80a494cedc0b0d04156180c3897f65140c8682b953d7. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/FR96X2101303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7cbd9da5b8e53a4bc1558c508236a8c033b41d2e33d6293cf7b271f81c1adf0. 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/FR2X42246140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x739b19f058ec094fa966bd3dcc36488cd36d4048ccfaaf858fc66d07dc14ca5d. Chain 2 (Bitcoin): anchored in block 958656 (2026-07-19T04:04:08Z), 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/FRX762205464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ac66581e9ae9b52ec7bf93908641fcd138bc91ab8d846ecbe7119abcebc9950. Chain 2 (Bitcoin): anchored in block 958653 (2026-07-19T03:54:23Z), 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/TRCAR2100022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ac66581e9ae9b52ec7bf93908641fcd138bc91ab8d846ecbe7119abcebc9950. 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/TRCAR2100022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb0029bda9c93b27246ac9f60e3087c1e5a31d7ea98647d4a8fb41f87ec51f0e. 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/TRBGV2300930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed957adce8403a65bf1d19378f9c24f999d0604634ca8c5a44eac90f3d4398c2. 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/DGA062383396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9d4058901df480835444cb288e49b204bc58610342a282e411c23dbce0e5c52. 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/DGA0H2489996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b777f86ee06a77038d34da9004ab2303e1d80e2de54c22a10611a2be6749daf. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/DGA0T2420583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x585ba8b232acefa891b6947af01d548e812ff27cf5be18e970662dbf53fd41a1. 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/TRAPJ2000021.