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 0xe0a42ca10a914d28dc9101f7f4755db5115912613a6d8c6e4e2779587c8906e7. 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/3fa42d2b-1707-4f2f-a4fa-bf5f9a810015.json and https://artists.proofprofile.net/proofs/artist/3fa42d2b-1707-4f2f-a4fa-bf5f9a810015.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 0x3bcba05e4701b43b6fc65d061ac1765337757071b15e7863bd03884dc7ead2f0. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DEKF22401104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbad8ecf8662c47583cc4b620c0562cc3f22a99e18dc12a36ce2d5dd7de94073. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DEKF22401105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f05712e17527600e6844059d20b4a9792a4725d060d440d567a0931184c9553. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DEKF22401106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa34f31e1d7a318ca01b5cebf71e702f24373745770b34d84bb4b1291312ae0c4. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DEKF22401107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93da4d5583eb97410f207ec4ec501d5657bff86acc8ba6e723c83197b3be379e. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DEKF22401108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56aab5baa2fcce924adb0a99d306417ea1a3ecfb68c2b0ffa6e7e820e00db1f5. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DEKF22400711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9482c38f6f993acfe1bbd1020d10e4b3bf2c0c3266de04d79934ee6bca7d2a76. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DEKF22401109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1128c250361a9c02210c492a0b543fe4b95f243b6d89b7651ba76c9b4a0ba68f. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DEKF22400505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16593286eb5e5112b2ca070278fea04ccdf0cef8e41520d92a81dea29ea77971. 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/DEKF22401110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a59a2bae75375f9451d723e0cb57da90337a1e038f06b9734aa276af59d6ebe. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DEKF22401111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56569efe0583c63bbe84c67e4964369cfdd5f2219cf1bd6f827d39ac3d6c4409. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DEKF22401112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50c793e2ff71171ec3157a9c43031266212fe2975d19794fbd9d36115fe80d89. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DEKF22401113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeee9c566eac9f74c46e88e2afc7512e4204e79e52e2920fd27b30412cf7ca895. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DEKF22401114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e281bbad99aacf62e353d3c4f0a3c1b4dbffd03d1e1e61f2cab93c2f53fd091. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DEKF22400164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebf91e97b226543779ddc199dd846beac835ab723a05afe8732646dbd9e02ae5. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DEE862401399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3828532a4c754dae6d30184d3e2fe42b8a2b1643d23ac1c256ccfa3da1543a0. 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/DE1FB2200086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3828532a4c754dae6d30184d3e2fe42b8a2b1643d23ac1c256ccfa3da1543a0. 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/DE1FB2200086.