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 0xccd5fdad84fa3b4b064509e67ca755c583f6b48a746a9c84e1765c9851212e2b. 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/0be98825-4968-4dd5-9e21-d6e64bb2c8a4.json and https://artists.proofprofile.net/proofs/artist/0be98825-4968-4dd5-9e21-d6e64bb2c8a4.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 0xd6ab3628fdb871e0091592f0ea43bf08b93c3347b74540935b38599313376dc0. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/GBKQU2031367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23008b8ad33c0a10a8bf005d2a9b7694c9f8925444a8b3fd9b9908e5ef6bfd25. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/GBKQU2031368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2e2de3e35d2def30f4c4a7d5ff41679759c752160333028996694bdffe7fa5d. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/CH3132115657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70690b7e209b256faf67b63fd1d3666b10f9b2a2b297b89d33555e63bc8f7614. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/CH3132216388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9436919288dd13116ed3624331e4914cd244a005551b7fd68246f2fbb9ef4f6. Chain 2 (Bitcoin): anchored in block 958143 (2026-07-15T10:15:04Z), 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/CH3132216763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74bebb75ff96ac58caa52559322ea901a3f67b121895f7e14700cfb79e1c5cad. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/NLHR22200808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcad6169e0759ef71f06e3fd6f8aa46c7d5d7fbca60089fe1c06897d7b73a1fe8. 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/NLHR22200809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe257add81061932881af4ea57da895a599ebc3cf7c4c0ca28eccbdfde987221f. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/NLHR22200811.
Quintessence, Vol. 05: Remix Edition: Become Human (Cayto Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2eba3fcd1eff765a036748e4b3c8ea94a5c48a9c3851e54c759c3b290a77a05d. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/CH3132318302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc71ae73a64315639e87f2ed6037cd75b32a6f8d9a53969624ad1f5fb8be3e62. 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/CH3132318732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24a66f271bf774b5aa16197065eee2a80b0c0178de69534343d4d53a3b2fa56f. Chain 2 (Bitcoin): anchored in block 958834 (2026-07-20T05:55:47Z), 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/CH3132419156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14798c359f6856d357f6b19afd9d95dc912c54b4bce7b163bc88886b520bfe83. 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/QMDA72559731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8abf396dd0051f7e47372ae4f64b45a1f4c40b548dd23a1c5f4a4c52c647a1b9. 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/GB8KE2314923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0a47a34875efadcf8d3c96f00f01926ca47695f3cbf06d8d1932e7725d58dbc. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/GB8KE2314925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf48c48c872317c9f90a03eb5493ac7c95d995d63f84651775a73e62cf9bcb68. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/GBSCL2095044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba6cbb2dab922a4bb8d22356bec548df2201d9dba7d851019ada3313d9c50d7b. 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/CH3132217054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e43842a36ab8091db82fc947101f61c303072ca3fc31e7667f28b145a6e9623. 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/CH3132217055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8732fd8ab84686968e870d0b399387a39dd2a6403658fd271900ee69277c1a93. 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/US83Z2512370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22dd27c88e0650c0a86b5350662b114ea7f4636bdf6ffd00c5ac045aee9e8d74. 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/US83Z2512371.