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 0xc420240dcc37d12bdc8ad92b778c15578d16d3f9a186cec93ca9453ab26491f4. 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/86af7a95-1a81-4e54-98f4-dee07225ac91.json and https://artists.proofprofile.net/proofs/artist/86af7a95-1a81-4e54-98f4-dee07225ac91.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 0x6f0b4bd13a06768eb4a3215d5369aaad1077652ab7b756960e9f7f7f4d8bd16e. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/QZK6P2071953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5628e9d746862b82e81d2da6aaad1978aade6e7357687069088dd58d98d6fb04. 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/QM9AA2002486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5392190c655d07c3deb83a05339f53418ee6c48b51fb2a1f8ca78e9efa940bb5. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QM9AA2002488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7858df7721a005831eb9da85da7e268d5e72716b2cc3a76c800424ef481264b. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QM9AA2002491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91879ed1236d5b89962b9f897450b15c93fc5988011b786c37f770cfc6d7e266. 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/QZK6H2100771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc120edd17407b38d8f681d91a1c05148b7a9f3d58df1897486dec6851ec40d37. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T17:55:14Z), 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/QZK6H2100778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x291bdb332b641eab4503bd5e0b6842174a4f872dc5073477ce87f5d9cfa30c2c. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZTAW2343922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5dd01357bdb282be95bb80ac0f08ed4024dd18d4de0a04aef76ec9d7432f722. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/QZTAW2343923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18a4d2a9f47525f600366d737a6cc50ef29fd6b4d29cfd7a32655646d1162ea4. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-17T01:01:19Z), 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/QZTAW2343924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bbb91f8d970c23defc5c42eaf9d6e5f3363a7420873d0d0a834d18938296193. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-17T01:01:16Z), 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/QZTAW2343925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4b24726f806e7113554385ee7c3b158dd4b0434f3fe3e8fe1f3341725f9abbf. 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/QZTAW2343926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x923a1a42f4b565636c5161a623cd7baa08bd308b192791fd429bb8c7a94e56fa. 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/QZTAZ2463136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9467e17cdf6502376d256b13096b089c2838dff534cb04cb1a83526832d4a5e. 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/QZFYX2569042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f42f6d7797c3d2545b9da373a6d3e0177df05377d1dfffb3d1389dfad0907f0. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZFZ72548680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x834b601f63a6c19935e901c93f395fa66c9797b2bcf10691c60e2e5f5ebd9371. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZHN72583676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9467e17cdf6502376d256b13096b089c2838dff534cb04cb1a83526832d4a5e. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:32:02Z), 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/QZFYX2569042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ff8be5d3503886d6b4a6014a63362f8fbdbde37cc258383d244dba3aab10561. 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/QZTAU2589235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdab4e29b98eace905ef5751dff1cc3f592b78848f14165a12b54dc12b87fffc8. 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/QZTAU2589236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x071e22ae65955a9b4ca3eaac9788dff2107c6ad5f3c41073304b86385d3ed1a5. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:10:03Z), 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/QZNWV2589006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e492567dc1d8bb1c4d2eefdd0ee7ed3207a858b49cdb9185523ce3271ecff31. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T07:44:20Z), 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/QZTAU2589239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8c7364a1a4300f99fe95b19072f3916c43c1c377e508d405c1358675ffcdbf1. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZK6F2557293.