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 0x29432ab135c458b325c321be0a6a5b5288a080169f263d28137584e4772f8894. 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/8eda90f5-05cd-4d37-8322-603b9465c723.json and https://artists.proofprofile.net/proofs/artist/8eda90f5-05cd-4d37-8322-603b9465c723.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 0xccb588340ac003772f68a1faf7353424d4a82765063781c7c85f8864edb310e5. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/USHM82153665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a972fe2ad4e6db4cfc5f75d9884ef6c0b0333edc797a079edb65e5006246180. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/USE831580287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa13f5cba79ca2153bf85bc9b163a8ce96ec8b6b88f5c34bfc68c377bf9c6c19e. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/USHM22084907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b3fc5263afb50d785ab8a5ad1d7f5d22e6ac27f59323eef8571c499aba8ffda. Chain 2 (Bitcoin): anchored in block 958658 (2026-07-19T04:09:09Z), 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/USHM22084909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc298bb3702e2008a999db0023f773143cc6b4d2a52cb263bc42e60855764f3d5. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/USHM22084911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf7533cb40a6b8cfaf839452987d55d5dbe5669921a035969ddbc8a43b1aae8d. 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/USHM22084914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3cce45aa8d3122aec59ecdce3094586d05ef496318c3396c3b8f946447eb5aa. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/USL4R2015372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56cf3a5cbbadad3c0a7fd8d4dc6fe991351fe7df8487677c41a1b6c103ca609f. 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/USX9P2019100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac4ac677592f7be7440ba221ff17d474f7554ec213e09dc0c23bd19fc9525649. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/USX9P2019101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19a1b57f91bde16e16755804e70850f9c7d6afab8821e462a6a16d5107dbe6b4. 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/USX9P2019105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53958e43342db4bd26c24df096d809003f6c7f91462ffc7c27dd58a4c68eefad. 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/USX9P2019110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d4dece445d1fda477bca3f5a35773717c426e812573f5a8348b29f86db95bde. 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/USX9P2019112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x658c2a1c3e00c2e2aee17b801eae68db2dca977a33de74c3ac32e2cdbf73563a. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/USL4R2161055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46b83129900a47ae55b64537656a4e6c7d8d9dab2221083c43940b97e96920f2. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/USHM82153640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x862fc2ad6b233de3e88584d4011be00a29bdf04a94b4c3941aaea6d4dda2b858. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/USDY42233454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfeffaf32bdc22116a7bdeabe21816f82a6235875d204fa6e883908839a75c4d6. 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/USDY42245187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c69aecf4fefb23f68febbe2a2cdab928a56c817bc679b85d7d392bd48aaa095. 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/NZPB12303870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c54bd105cb50d3ca1fd90b7c4b320d644310d467862c77a203c7dc0e7ed65b7. 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/NZPB12403610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ebc665fd58c7bd0a33d48b0f0c71e4a492ae2f38399bda6e278379e53fc7947. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T21:23:21Z), 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/NZPB12401589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b55671085937736870bb339b1e6326a1f3df5b4eb5a33f3bfd8896f58b33b41. 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/NZPB12402710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff0a222977e6cb2aeb3c99fb77d79b2cf5413efff5c52f22cbef18823ac3f437. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/NZPB12403827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ce62a91e1fa3f2a78bfb7fa19fb7d121258955d98b867b6c18e3a6e4f40da52. Chain 2 (Bitcoin): anchored in block 960435 (2026-07-31T16:33:26Z), 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/TCADQ1848143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4311dec4f2def1fe8f2e318da7585f0f74c34c95b12171b80f032c177be51ca1. 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/PT5HK2100033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0665c949b50a54fb98f9195806d601d71d017bef0cfb152dcd5a0c27b4a73e32. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QM6N21995952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22c9966cf0e9db47194527d6f332ce82cac446f07b6f587d745b296007b2c174. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/NZPB12303666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ce62a91e1fa3f2a78bfb7fa19fb7d121258955d98b867b6c18e3a6e4f40da52. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T16:43:41Z), 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/TCADQ1848143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf14b43ae27a64af8a59e7a7f0e642d155ceda6bc3a53ef90a47898e92e44d39. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/ZA82Y2100145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb37050128f532481b97497bf3804ba14e3dfd786b8d03782c22cb8831cbdda32. 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/QM4TX1905955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bfbca15cbe3c8a36ae72a273706663d8db54d101d19597e17cc4ab5d18b209d. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/ZA56E2304312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c9e9476bcb1cfb8486e92ca513ce9c60b92d51aad7cd562a75e0f8a6d5bcc5b. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/US6R21447620.