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 0x2dfa01f6920e5418ad4b9414b53cca6c4795c49e7c9d0887043e9aba7cec7ae7. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/80efa3ca-3e10-4004-bd0c-ea58aadc786c.json and https://artists.proofprofile.net/proofs/artist/80efa3ca-3e10-4004-bd0c-ea58aadc786c.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 0xc6a33477f240a1d2a71b91a9149972530c5692b8844ffda86d2c941ec8b82be9. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/QM4TX2115086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38fe1b533706e55a2bae7c49fb0a489e8775545c239feb96bcb77297d2332023. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:56:13Z), 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/US7VG2365525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf0a089c1069d2689a77c627a8d7916b745211ea34c0a71b21291760ea859fe7. 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/QZZ8A2351177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f4901454bf39ba34d15685a098516ee755efa1947a13b7fb20ff29b79979732. 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/USLZJ2421957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda5b1c8b63da3712e44682c795a8d034e3775ee5c571655cf0588ff71aa9a13b. 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/QZTV32404727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa385f1bff2228b9701681464b5929838416b57fb6d18f1003fd39304d43fd5b1. 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/QZWDE2421814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0023067b5fba66b9b7328ac80712a41837ef9628c060c5fe7422120bddc2fdf. 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/QZWV32445106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67d71e8e784cbb0998598592ff3a49ecf69671bbd69947a27e309b22df728d28. 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/QZZ8A2459637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d64dbfefb58b8f1c31ad4052563d1b01aa86007a6f89b11f7379d6f0c2558cc. 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/QZZEC2422723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58078977b8ea1667cddb81b11971171e9c4a27374cc50777767cd9d2c1cb6d4e. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:58:55Z), 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/QZWDD2576578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda5b1c8b63da3712e44682c795a8d034e3775ee5c571655cf0588ff71aa9a13b. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZTV32404727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e507aaedde9844793fed17afb795582711808e9421fb5902670ee28b4d33491. 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/GBRKQ2472079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa385f1bff2228b9701681464b5929838416b57fb6d18f1003fd39304d43fd5b1. 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/QZWDE2421814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70758ea8edba254ec29af4767916cb5f426d22098ae2051ac3cc2ad99cc33f67. 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/QZWDD2428960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x745e9b87157b89b73cc8fec900bad6a29048dfc73d2c68c0fff3c335f169dd93. 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/QZWDD2488770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f4901454bf39ba34d15685a098516ee755efa1947a13b7fb20ff29b79979732. 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/USLZJ2421957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x745e9b87157b89b73cc8fec900bad6a29048dfc73d2c68c0fff3c335f169dd93. 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/QZWDD2488770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e507aaedde9844793fed17afb795582711808e9421fb5902670ee28b4d33491. 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/GBRKQ2472079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb649d7945d051ceff24d16953391a8e6f2086e88eae78beb83f773d8e71e9cd6. 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/USCGH2407238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4464470023b2b007a68a92126f8ea458fd53de8f1708836368a3082b77841e1b. 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/QZTVM2241655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f4901454bf39ba34d15685a098516ee755efa1947a13b7fb20ff29b79979732. 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/USLZJ2421957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cb7959886b8d6540567460e7a96039839a9d4973cd593d92fa53a1b463c329f. 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/GBWUL2307613.