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 0xfeea59038a4a194a157e4c883bb19f0fb047b49f7df7c0f07dbc7dc7e1eaca83. 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/762b1e2d-d701-4912-8198-ef3e1dfcc8dd.json and https://artists.proofprofile.net/proofs/artist/762b1e2d-d701-4912-8198-ef3e1dfcc8dd.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 0x1169ecec053fe60b27ab732548af760d1aafa739a4022e4d2765a382646506b9. 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/NL4NL2164252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93c525edad5723f9f90b6883630d557f061b40361057b33483a7f395fb5618fe. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/NL4NL2212732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f5230bd3c8ac2c8db0c76d3c1dc3966609dcbe8c21383aad7b2f10a39710c68. Chain 2 (Bitcoin): anchored in block 958697 (2026-07-19T07:58:24Z), 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/NL4NL2214436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x957064feaeba2bcf139f028dc1b567bfadd53878cc076a875d4a6af554a7fd50. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/TCAGQ2256645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x719fe6538095260f7420694772f03741a22369befa3e6c08d452746c17b44507. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/TCAGY2372369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcff5ed05289dacf99b6aba3616454d74f57cb4ba08458473982fcac6990e6c06. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/TCAGY2372373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa26fc1810e11bff8dfc7698281e47e5a1637bb2ce3bd61a5271539be72753e9b. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/FR9W12354027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01178ae9dde7d3eea873189556973632e38128c0c146b5733c415983c9a9274a. Chain 2 (Bitcoin): anchored in block 958776 (2026-07-19T20:11:59Z), 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/FR9W12354029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d6163a1c0e91cfe0ce6691e49fd1a2437e131ba7a355d2a37aaeb59d2b8f97d. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/FR9W12412269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cadabca694d1d0106fd30c946af041ffc744810e1e2708975307ed7f9cabcd2. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/FR9W12412270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e88342643cb914502d540ab09e279bcb23592ab76a0f358ac00223517fbf70e. 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/FXR732406308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e88342643cb914502d540ab09e279bcb23592ab76a0f358ac00223517fbf70e. 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/FXR732406308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb01068e038b49cce5fa2844d6fbb51365b5aaac10b268916d2cf63728e31d779. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/FXR732406309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d361935a44551dc5ed0a953503873b38875b0d3c34c1a70512077c6de51a1fc. 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/FXR732406311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a8a85d146cc8bf838363d4f2907dc8ecc131ab2161f299def369488a7e9ecf9. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/FXR732508351.