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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x500748f1d66e277c9987b02dd3a864529acb975bd188f4bed0fa02d2504b1620. 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/cc93c9a5-5532-4ffc-8ef2-2e62a460a0b8.json and https://artists.proofprofile.net/proofs/artist/cc93c9a5-5532-4ffc-8ef2-2e62a460a0b8.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c3c221bcb0810f37caccd8685fd8c0cefcd046707d39fcbb49777af622919b9. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-19T22:07:06Z), 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/QZYHJ2593439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c0913b2acd3751d70f2ea02e25af19b444f5237fdde51b10c872385a7ef5f62. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZYHJ2593440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed14a9445da283742608c120e6fe6534925c0a778e0c959913b8ef5e3b5c82ba. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:18:27Z), 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/QZYHJ2593441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9406782ab4c0854be72b082a1b3c0155821babee5f4bfeb75affb40495a6037c. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T08:36:05Z), 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/QZYHJ2593442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f07d6424cac54279f69a72b11944f71b3497fa24e2d3af945953e1d75c40c85. Chain 2 (Bitcoin): anchored in block 958860 (2026-07-20T09:58:28Z), 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/QZYHJ2593443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0c81a9802cf69296e7ebc2e5e241ce016b7557beef05f2a383ad9d9f4ea1066. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:54:09Z), 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/QZYHJ2593444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca766d48cbd85ab87db4c3f27fdd856f51e325feecf1c508c763c2a9c426e444. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZYHJ2593445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43504299a1dd10e0939390446473fbf0f034112b666729ec63ae79cbacd584c3. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T12:18:16Z), 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/QZYHJ2593446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dacf91025dc9beb28c82b65d51988bbbda4e50fd07ed0f7ecfa003526af8b90. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZYHJ2593447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b2a0b5d8acaa48546d26115861ae75485d1083d3fd477e6f38b14c22c7ca83c. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZYHJ2593448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cefee04cf19012509bedd97a309fb038013badfd4708c1d5988e21ce588b69a. Chain 2 (Bitcoin): anchored in block 958865 (2026-07-20T13:21:33Z), 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/QZYHJ2593449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00de5559fdbd28b98df014aa0818902ee8c5c546ce12ef448a7b72f0e1cb679c. 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/QZYHJ2593450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2111f481b54bd94c09fff0c7a54bb8793feb43f5dca842ebf97a4ed88eb7e11c. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:50:51Z), 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/QZYHJ2593451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd79a20fdcb96400c879998f1ef4a1cd8bb15c8bbc4d2a9c571f88e7eb6cdfaac. 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/QZYHJ2593452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a1b746139a3fa46baa2dde44778ed3b844399338cba9238f1bddbbb71e34ebf. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T16:06:55Z), 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/QZYHJ2593453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0323ff370a61bff5ab545ba80fbb45e111c50ab9d2b46c8ff4f9eb6d84bc674. 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/QZYHJ2593454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79f4cf3116f53cc1dfbfeaf29f604488eeb7939663f9ae700ef4b5389e9975b6. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZYHJ2593455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bb498895e2c304e7cb40f87b77908ed25fd772c8401cfb299596f7ed73aa0bc. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:26:19Z), 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/QZYHJ2593456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdec2c096d1d525787dc334cb491b0e17afe6c6d56965fbaa5287a5e5ca3092cf. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:25:32Z), 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/QZYHJ2593457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe31205f8c371f1e04358484601150bee7eabcf6b86d63ad3963b33f248c13f60. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:32:32Z), 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/QZYHJ2593458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62c6b6d87036dbf6fbc7c5a6e2bc4a2d31529dc06edae026e610df679b0a3cc9. 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/QZYHJ2593389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80d9650db70db59f3293dbcd0627df9e90670bb4989ce9d2e2ba2e722870941b. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZYHJ2593390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee5a9c19c581956e07037cb089018e136a0ec571aa4a67cacba046209c6b8138. 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/QZYHJ2593391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fb126d9c8b4357f562f3e7e3fc6e1c4f965dcd0d037d0f3fa11579b744d56d6. 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/QZYHJ2593392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb9a6c9e69604a257e608ad31875edc81df5d2ec0a3841f5855c3397cabeddbd. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/QZYHJ2593393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0d70dcb76f6c32161f356cdc95086254535b1fbf7281d0da233dd4e23d50d41. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZYHJ2593394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc27f6c80077f5cddd86443815141f704502bd45b2315a2b6521eba87ad0bc38f. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/QZYHJ2593395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde7baa3af48d81962615beee5669a4819e2b9f7ace67a8b06963434bd6a4458c. 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/QZYHJ2593396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97be9b962895bcba696613f7190179f19aac53b32b31cc27bf08cb6fab9ec538. Chain 2 (Bitcoin): anchored in block 958376 (2026-07-17T06:41:00Z), 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/QZYHJ2593397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d9593c48768d18f3b91633a87c12264d1332518bc7fb610beae3b54d60926f5. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZYHJ2593398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa45b8d4e34069df1a6575957cf924631d9e6b119d3e02b434760207f2a5b4d23. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:47:10Z), 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/QZYHJ2593461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80300a004f4b30414c88bb93155da044fda0ab0b5fab964ad8bc27f075a03e16. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:19:04Z), 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/QZYHJ2593462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c811bd679543a50377ba1b29c7f4bbf3a7d4056fde42ee6ff9fea959792206f. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T04:29:18Z), 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/QZYHJ2593463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc70d3e904f037e10971e605cec27fbe30198643b6fd9af026c8889e6d97d73a4. 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/QZYHJ2593464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d409ca946bff0edf83b4b9cdc8449321c774bba5c67a65f5ac9bec2e17f3bd6. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T22:35:38Z), 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/QZYHJ2593465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6efdcb3ef5b008d5768f7d5865d44540fe08e0d29e3241a5266b0defcf2a1a5d. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/QZYHJ2593466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5e4507c2ed6bf35c0b590a639af5fce3c67dd5c37a04dd369b7b4d16e7fcf95. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:48:27Z), 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/QZYHJ2593467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x018e3a7f26123f348635f38ebf131b8afa0b9af22a88846cec78f8f0e6c07dd7. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T06:42:27Z), 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/QZYHJ2593468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28964b77a29ca5baacf655d78c776d8b0e43e46e9f138d277e5bd2143936b1c0. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZYHJ2593469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5c6aaf6ddffcc613ae35bee13a054f46ccdb94c1172ed710739748ce76fefa5. 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/QZYHJ2593470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x534b5f22c2a8fb08fcb8bd42ce2eca980a93c32af6e5d59ed92f8094764680f9. 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/SE6XX2563780.