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 0x96ee14ecc0aedd516ae467c6d619098e9794acc17b82e9abd3b758990a15f410. 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/f79ec6bd-7653-4fc1-981a-c0f1632d0c8b.json and https://artists.proofprofile.net/proofs/artist/f79ec6bd-7653-4fc1-981a-c0f1632d0c8b.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 0xef9c90365b325784ea27a79352951e484d952a0c3fa48a3cce42083b1100a538. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/DGA092336466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49c1971f77369487af868311fd8435a9da7f5dbed683d6308a6fdbcc5afb3afe. 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/IDB842102931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dc318edd242008272931a61af584307a3fafae7a77c6a9a3a87e660989a5b39. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/IDB842102930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8756769fec1df2088d9b9f2cfcec3258fd4556c2427b5ebc7961f3b8dbd05b8d. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/IDB842102935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c8ded089f2f0edddda04c32b22cc4435681f8f9fda0ee91454e5cb9cd9cb6ce. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/DGA0Q2346156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87fc7126d25d8fc37c1d7e0ed9c440ffb87cc69362459d025edd5da3d2ee2bf0. 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/DGA0Q2346154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4c41bcd9100cfbb05409b52a8d65124433fa0828e48dd7e21d24dcda21c09af. 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/DGA0Q2346155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1ff553d00bf597383e24632f035793c3c1b325a71f96c2d6dac9d20189c1de1. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/FR59R2494071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x393acd2bbe63f2e047708b16cb372b3f4e4c7bf668423ca95bdcecea2608332f. 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/FR96X2425920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60ae51dd80c91228f2c96a9dd628c0aa99511fe2d7779dcdfa6c76ddc3163679. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/FRX202456087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbd99980334a10b4f1d28ee3d3448ac35076e8fae1a9bd8f07268fff7478352b. 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/QZYHM2413048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a1f3f644db783fcf1b784297a7f4cc8f630a173e18c80c80ecf1777d9771494. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/FRX452486636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x528ba83cdb3226737cdac5eedc830e0bcb3abf8d5ffbe07e26a51bac0b283eef. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/FRX762403867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb05bee495dfa3e4aa05f7d607c9c07cecdff2e12a1b3582a07a6176293489e55. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/FRX762427048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45a2a56fabcb04879dd53894095f5e85269469e8e50284b37a56c4950210a55d. 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/QZYHM2418277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf002d442749626bb5b735d59bb38d364de04778e0b28a327c2fec7d764f3dd83. 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/IDC012400027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9679c12e58f3937ae83168a999ac645a2892c8f49167534ac39dc59ba4fad40e. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/DGA072461019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfe1cc93d79d491043053765cef65c8af0e03bef06ae8c63b9c66b656ba0536b. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/DGA0L2415249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94b59c6642ffedd52be1fff4f6fd89d563b55fec730b94be2ef53295d1b6bd61. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/DGA0L2409795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf02579ffe92859f41b1640704e38a316f9bbbe8ef196eb69b5c2855b62eb8aa. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T01:08:10Z), 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/DGA0T2413885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4db86528b89ff13d3fd1562d3568ba79ff6b35e3cdb2e68da23566d5d14a798. 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/IDC012501142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7926edb6a3acbe692ee490a9dd6ec8bf77114261f5e11a22780aa0dcb530b437. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T20:03:27Z), 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/FR96X2518059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2253343fcc67970d2b091cd4fdfbd6fd1556712a9d8172f5def7c846f6eb8c66. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/FRX452537110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x069de47ff13c759e99bf3a45f35354c58012925776aea5d74367321ad665536f. 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/FRX872552165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d2b9597a95e71f5bde38be612f913aebf316b0247a3a356258d5c21fd7706d9. 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/DGA052524384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd934c9658c74f69a26a06e300d23d7601a4c68886e00c4a9c74aad9d92b5a048. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/DGA052567185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62a87ccb55b2456c1c6f5b3af0e8eb6a620aad13836efa17bd623ea69b490a7d. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/IDC012502224.