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 0x920aa2303f9fa7b34f2d94aff71cb459c91420682885456c1270c250aa4d8792. 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/477a5f23-03fb-403d-a89a-65c92df1c38b.json and https://artists.proofprofile.net/proofs/artist/477a5f23-03fb-403d-a89a-65c92df1c38b.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 0x2a962f18c1c5493f5bb8e9005307821d8e777744138a28e1eb9b6fde2a9dc2a2. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/QZTAX2283540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc680755b50aef4c91774133c8571d7d65ab6ae823ffa655d5cdcea13d6841869. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZFYZ2361763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc680755b50aef4c91774133c8571d7d65ab6ae823ffa655d5cdcea13d6841869. 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/QZFYZ2361763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a962f18c1c5493f5bb8e9005307821d8e777744138a28e1eb9b6fde2a9dc2a2. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T20:03:27Z), 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/QZTAX2283540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6626b540cf2abec32215942666898d6d8373ecdfe152d8c988bb747e91b5b441. Chain 2 (Bitcoin): anchored in block 958531 (2026-07-18T09:39:18Z), 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/QZES82309246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50ac5c1cc9652c5873a17ae8c02de3a6cc79a2e92fae9fb11746fc8dea5273dd. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZFYY2444976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71f85f08b3afd83d4335d14a69b6de6304f6c8d9d090a5901b69f555922088f3. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/QZFZ22411472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7154160995c621e8b4bdfa1ea6f9cebdb8703cec23f17d7552bf401c38a4e801. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QZWFV2445959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81f0f0db1b7b5d02b1ad96feb994e9438a1172519d1e8f882191284066747061. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QZZ7M2458681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3668f60d38f45ff6845804d104b14b243433292a35270070af51c051942233a0. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T23:10:23Z), 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/QZFZ22521724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7154160995c621e8b4bdfa1ea6f9cebdb8703cec23f17d7552bf401c38a4e801. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QZWFV2445959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd96bbc0597bed6b478be7d37a482aa67f00d89ed732a2e29dc633e885ffef534. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/QZFZ22521725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d04743b46be9eb860f257e5440370aa06e233e9e7e0025f58078bbe6c149e06. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:52:35Z), 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/QZTBC2540671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d04743b46be9eb860f257e5440370aa06e233e9e7e0025f58078bbe6c149e06. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T15:07:00Z), 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/QZTBC2540671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9b90773baebe953c4b95bf419db117ee87de61e28350e11569e822e638ab325. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T19:55:07Z), 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/QZTB42589463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9507b2772193c67018a5224e767fbffd7a8322e36516755b3b92bc0a08b45f8. 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/QZTBE2599350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5671a9fea82832dec209f122b6d05b96f0f7614985624921cc91b4d41360999. 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/QZTBE2599351.