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 0xf5a8af34f34aeb2e7ec5b81bbfb77aea862691f1c43374a02372fa5f93405cf5. 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/7dfdd979-9064-4ec3-a6f2-bf9eb0893b5e.json and https://artists.proofprofile.net/proofs/artist/7dfdd979-9064-4ec3-a6f2-bf9eb0893b5e.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 0xf60546c95ca439bf21e7ea7c65c5788b6337c0ba00f0b582c524c598cffcc9b3. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/BXFAS1700005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x443f3320f9fbbe5a6070f154e7537748de6a8468e9ffb078f2d0a31f7f373f71. 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/BXFAS1700002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83222527676fe6a9bcf5b360d8b3576226c38a00a10f59e35f6467bf8fdfaef0. 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/BXFAS1700003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f5aaea1b4988714c63b90ebb6e9a186935d9923487ae9d41f9cf4c5d29fe473. 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/BXFAS1700006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x592172e48fa6e489827d8715aa85072d98479f8b1a4cc2f1e322a8c45a56f2b8. Chain 2 (Bitcoin): anchored in block 958218 (2026-07-16T00:33:33Z), 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/QZ5AB1703456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1254f8aa1e22e02efc191f3d43296c112b71daab2b0023f58d49adeb1c4c332c. 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/BXFAS1700004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c53b9162eba2e050f6f1c997d698f0ec09a2550082f0528e3e492e8b8afee9c. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/BXFAS1600020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x443f3320f9fbbe5a6070f154e7537748de6a8468e9ffb078f2d0a31f7f373f71. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/BXFAS1700002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32d72420f986273bf7e03729b7f435f0b9a102cca967469ed7805bb58fb68ab6. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/BXFAS1700001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74a94b024cec20a02b69566bc5c33e12a5bf5c9dee2a2343dd2285061b52444e. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/BXFAS1700007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd17b28bc3a3a045274b4bde3493b24285fb8f072587eb1e465e683a81e7c48f7. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/BXFAS1700008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d7542220cdb6062bdd22fa4dcf06eb3bd75d921141e219fc74dc09ac7a22afa. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZGLM2129050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d467ea4f64f32df5778a0834db8e570811ee683fa5f31dd402bd31b642c46c6. Chain 2 (Bitcoin): anchored in block 957065 (2026-07-07T16:43:21Z), 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/QZHZ52087076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd67c7ea11effc3152762bd147d33624495fde81decbe9db68a851ac38b2a6281. 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/QZNJX2432317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7f0280b6b77d4717d9f34ae8e7baa6c0e06aceaf11fecc4e96ab326078f7efb. 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/BXV602200057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4f1bd27decae7aae1e8a405bcfecf267cb67c309ff9b31a162471f013880e84. 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/BXV602100099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16f3f93a5ffc821182d7094dc51534b61ca32a11a45179037beccbbcb899d87e. 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/BXV602100100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3ec7836acaa025da41ad6bb5f084802d17501e321b8f0cbedce72d632d98a73. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/BXV602100101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca08add467fb2514d1e2b6f8c3ae64cd4a2269790bde89783b4f5e4b8302a708. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/BXV602100102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0a002ca4d44b874306f0b4b4c689caad35b8e2b1b0741b1c91e1ec815e14b82. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/BXV602100103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x736eb2b24028413e63413444f6743088c99a0e78088aa773e5b528c1aeb34097. 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/BXV602100104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b4e0893725b9ec51f5c403d3e6cd36a515c27f22a85eee69985fea914901956. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/BXV602100105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cc7431c5578a4d086ef140c691cac2d94cfe9aad427859d546fdf37d406d713. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BXV602100106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a9936a744d0bcf9a210f641d0b5a160d3dd2fd6723a627a58ef15a51436480a. 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/BXV602100107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc174764e4ccc2b230729a0624a46acb92cd9b53ec70b55ec2ae00689decee41c. 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/BXV602100108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c94384da41e5c817d9a9e81ab52650fad4cc30db727ac0187fe4773b2e4885d. 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/QZGLM2541601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fbd81dc4808934f934b67845a00a9f55cef0bc12db6116a8755c275abb58462. 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/QZW9K2436280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3b66c30079fa2822d8e04feeaf510982bf49a0177096bb0acbdd7a443e30a4d. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZTPX2418111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaba2f292c8e3766ee0d875dfab3bc52819f0872d409441d986afc6cd33ead279. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/QZ5AB2397965.
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 0xc56a3e0d923cfbba61e40064c9a9492b4767600c4504916d53fabec192c264da. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/QZ5AB2397966.