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 0xaadc5bdc7613fafb3345581a4ef132156bfb5f88502d634ba16af1b8f4544041. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5079718c-91e5-40e6-89d7-1b1da59ca822.json and https://artists.proofprofile.net/proofs/artist/5079718c-91e5-40e6-89d7-1b1da59ca822.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 0xb021288e19b0f3418a2856ee4e0bcf0e7ee9603878e0360a4b2ff901b600c1b1. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/TCAHO2386191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38e76cd484dd37b4beffd6fa2955eb942a23650dab62e41bc8817acdee05b22f. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:22:50Z), 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/TCAHO2386193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc304c4b18b0b7ffc574136dda3a046daad8580a6cd32dffae8e1a2b03d6c4916. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:40:07Z), 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/TCAHO2386194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x590d6a46d4559409e55f25f8fe6e2aec14a5926d386dca188e273cf5cb2d8cc3. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/TCAHO2386195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfed284c2f3851ffe05eec91d7dcf08137f3fd5a4b6688d80919a2a097a68253d. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/TCAHO2386197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbfe9b8c2f5c842fa960d231a2797a8a5a418e621be3c94f9c5e41d9fe698d85. 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/TCAHO2386203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03b2cf1186c57bcb65c8d0aec97f22f7b4fbcad600dd471ae10f1868e216669a. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T04:59:09Z), 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/TCAHS2366255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1a731648a12003711e41dc88390a37e939605d7e5f0ff1c0f4ad2ca8ebb0d26. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/TCAHS2366259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6668a9ad9447891d314610609752ef74e28dac7e64e8682f4b80ddd53ac0e7d0. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/TCAHS2366261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ecda88cac818ccc7c608e5173ee6ade7914da5231ca90ae18d35113f4adf501. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:34:13Z), 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/TCAHS2366264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fe14e0700633132150a317cc7683d85edd75a5cddbf86f69864ac2aecb2761f. 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/TCAHS2366267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44506a7842b3e4aa1abbbe2a78809fb2f2d708189c585e1b5a44636bc34428dc. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/TCAIY2496275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b82ece74c633bfbd25843188e8b7722a9eacf9d39f2d55bdb2cf98d0ae654a9. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/TCAIZ2478736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e9eabe1a90385e4e1b3cf95c3dacc6607b34167d53669568ab1a24da1d17dd7. 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/TCAIZ2478741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x818e898e45983b80cf0c31c29f6502c9b74840465e9cc7074df20bd8077c3fdb. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T23:27:55Z), 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/TCAIZ2478743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe15b494a100b33cf93782e8059ce939c3584da46898e455f51616a7fda60eac6. 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/TCAIZ2478751.