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 0xadeee2cdf38d6a3a1418f95e64a57893fea282e5173619d62622eb2f9f2e0a4f. Chain 2 (Bitcoin): anchored in block 953674 (2026-06-14T19:07:16Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5e410ea9-f68d-412a-b8ef-42cbd5c27e80.json and https://artists.proofprofile.net/proofs/artist/5e410ea9-f68d-412a-b8ef-42cbd5c27e80.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 0xca10f078063c73222166525a4d8d448a81b80839c9c0d4fccc3642e53c8c44e0. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/TWKS52300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c75e62ab09616ac9e60dafde1218b186249d86b3a68740d4aa1527497f1a4d9. 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/TWKS52300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04bcaef17a8cc4bf3a077b011ac58d2671a984e7335f1911ec506461bf8ea4d1. 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/TWKS52300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23cfb2c7ab98e5b6517d5a57c374be65a53a264708d28a49bee269b3719a09e6. 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/TWKS52300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86eedaa934c9d441dc6ece6374e9cd607697e5f1b0e4c0cd40f469e7d7e72681. 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/TWKS52300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bd0a779de43776612deca8d71536723ed36202e5aefc51e48ae2648d33e21c9. 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/TWKS52300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d41532d5e70d47d674d381bbe18b1de25fd7397f84368b3270690dec8a3eb42. 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/TWKS52300012.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e963654fddc9dab319d4a38d3e3561afbb2cb591ed4e343ca1965449e70fb63. 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/TWKS52300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a726048e60c877286c3d2393e909ef2869f80b1244a3438e83410bd4db2ab08. 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/DGA052316716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51c74d52db50097311e855fa2ad248130279e58b2f303686d6e60d5d5162975b. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/FRX202386184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbdd8f14968dc6958876525351368ca7b099944a86f63cc1af65705785c2c8ce. Chain 2 (Bitcoin): anchored in block 957246 (2026-07-09T01:49:50Z), 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/DGA052316717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2dcdbf50fc847ba70f2d9a339ad939c4ddec0c111618af9a574e0c512497733. 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/FRX872344869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c1ca204fdf764275b783e62309f41c7d3f20f66fa316bbc279f3ee698556b59. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/TWCC32417362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd688f4a669f67990b1a72cb4ad274d097c31adfe51095662ff393c8b120748f3. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/DGA0R2326872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2dcdbf50fc847ba70f2d9a339ad939c4ddec0c111618af9a574e0c512497733. 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/FRX872344869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb622b2fa82f25c5423d74d6f84a96fd469a4ecced9f9159b91b8c57212ff98a4. 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/FR59R2329343.