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 0xe8f3d4955f1a9ce2f01ad423d9a99946dae16e3d96d012315bc30724dfa14035. 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/0a892d71-5661-42fc-950f-0eb51ed5156c.json and https://artists.proofprofile.net/proofs/artist/0a892d71-5661-42fc-950f-0eb51ed5156c.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 0x717b47ebb3ebdc7e81485c25492e0f4d5c462410c99f8cab17bcbfe924e51db1. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/QZGLM1929022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf98efa548d78fb9f32ebc86bbb7a1b7c3ac815c7add8af17e15a2e2fd73f7891. 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/QZGLM1929023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4608f1709e38b4c7bfd24ff38cb1d5475653d9e7ee092e7a0a812c6bf157c164. 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/QZGLM1929025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c441c021fd72f46e38d39ef27cc08a89da92f74dfdfad57facb77ef06323f02. 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/QZNJV2044818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0df7da17c3747e695e9d9f8048fbbefb96d948b8a1a8b3d9120c5eadeccfeb16. 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/QZNJW2044015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89c704d42ec4d57bc89ad3b7297333bb9920cabd34d84087220fecca2dd65c78. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/US7VG2180646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x668ff135d3cb2c0d14a79708cff7752018bcbc00a76dc481173dbb32cfc034d2. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/US7VG2180647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0e413beb4a6ef3a2dfb80233c998612fa1c88066ee80d8919c7b7a0f9de0da2. 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/US7VG2180648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe92830e7445bad2aabcc363feebe035c88ac54c6aea1be39e161fdb8855c25f8. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/US7VG2180649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1123a2de09839242460075d42991baaa1470c33b6f065c9e686c8991dece7e1f. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/US7VG2180650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a81f226a88d76a866ae1335d0e38514fc616dbbe0c6b7c2e2281f99eec96247. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/US7VG2180651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6674813e8fd618785e720c3803c3b62ac4739c8487894ce6fc3e80d4ab54037. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/US7VG2180652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa9212215bb03b1e30559e30dce79644d51cbf54c186101be36e15d504feeefe. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/US7VG2180653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d3480cb12686f3f77cbee5c624c0319691f04d13a1deabd22665cc1f09941ca. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/US7VG2180654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefba97aeffa50e0c420367b6e44968d6e7763c4884f1861b65cea6c607809f19. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/US7VG2180655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x057c772139804bd065fc8d4a5ccb06e9165b02abc8755829c1608218430d1f33. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/QZHZ42151494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4b9db15619ff7662d03e68a6a6a4a4b85feab9427cd120ed5df4dcbf1b2723f. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZNJV2133273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x460ff6b470c88ac4f97e5bb755e7c39ab8273fa65f4f333a7d46ea90946a095c. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZTVM2371818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1c55b44eb73dfd845522341eba218d7e665179f0de2ae6085eaade3394f6c98. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZW9K2388193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb53c59978f3cc271bcc918957acf6538b7d54973d55dbfc3c8566c3c7d20af6c. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZW9L2260364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2514014af1f436b2e7fb2bb324b21f342c0f073bacb48adcfc6d1686a225b0a1. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZNJX2363979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b28e15a045a597e1c49999cd968438815ec0683a9d18c492bae7a7ce5b1e162. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T18:47:29Z), 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/QZTVM2113123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85a16cfda8b91a267c90abdaee9fa6fc25de2ac5361808bf2979ca2fba0419ac. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T13:34:27Z), 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/QZTPX2356888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3656b32070a1d29aae40be9d644b58fbcff5bf11e5d472a90df1c7de692fb32. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZGLS2166188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26ce7411f6614eb191b08b2793af5499d72d329cc4799827ab80b41d633c025e. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZNJV2409680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d199953632143b94b466564303ba1391a82f68ed781a1ccb6fa8b476e300328. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZW9L2446698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd939765490e66f7b7b3093c9221f632fc1c6737fca9c99228b7a9b13f4d19610. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/BK4DA2456178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadeb31c5d5b41e30516b026b13c8b4a80981b30341aef83434c200dc4e245e56. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/BK4DA2451890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46432a4825e80f0544fd8039b750630cb46e0a93bdae80afb91b5e7a3bea803d. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/BK4DA2451891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x499c4173fb4f135ba729e14e393294ce015ed056161c804765d93f19346cda1a. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/BK4DA2451892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1d8395f442bd1da72b23103e8210d0626de11b1ce580bc823ac92037768fc4e. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/BK4DA2451893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c4644cca1265b860bd6874f357b99bcea2acd9cd35ea7db4c5c98d6b9700978. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/BK4DA2451894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdabb665355708d11a3a0d912adfeb75d436520da9dafed397f2c16feae3f1679. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/BK4DA2451895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb37096162a8c15d244272500c864c6ea864e1f6bb0603c292612b3efc093369d. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/BK4DA2451896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ab088c2d0a63010c28f1dd0c036fbd49d5a2564d6bbedc2501f793adced01d8. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZW9L2362758.