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 0x872d2becf6ffcff03340fa6f1d37927cac9d90ce9dd0a5d561f10d351850cc9e. 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/ecc3ae51-a5c9-4da0-b6b9-34dfd31b857e.json and https://artists.proofprofile.net/proofs/artist/ecc3ae51-a5c9-4da0-b6b9-34dfd31b857e.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 0xa45d95eab47f3896e4fd5daff9427b1b8fa04b2c70c0e54f7b7dfce06808db3e. 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/TR0510601246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2b03db8c630fba635472cf3a73461e13c0b93fa94e4d41b3266f11a8a6301b1. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/TR0510601249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc77255bbd668856b8e24c178ac8f4b9307c0bfd0cf938f86a47a2a512491d6a7. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T08:32:16Z), 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/TR0510601252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71528d10a0527d9935ea0ee03d47cbbfe0ba7bb5c87d2d1485b7c1c95a8181e4. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T02:40:01Z), 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/TR0510601250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe91e3fe1449b8bc9d167bf460091697730d1b75146470874d21a7c22a316db59. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T02:57:57Z), 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/TR0510600306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c3221d89ca92cee47ebfdc17aa1b1c0068562553a6633efd0976d4727fd7756. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/TR0510600297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4db918c73d3169521aaba77a1093190c7e2b5e5fbc6869c161c9cac9e5fab8b7. 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/TR0510600300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ef6de04bec10458fba12ca57bc0b8d814ef0fd683f560e84e4d63d8ca148a13. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/TR0510600299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc8105658d68057dcaf778a9b0d98c720df5452963e68ba3095ccecf9ca536a7. 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/TR0510600298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8076530b1629cf082d9c386fd6a9601c55fb9e5aa449f814a2eaa3c57f8e88c6. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:45:50Z), 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/TR0511905858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaa2df6085d026b4a9ec34caae9c781280baaa77cd58741abad4357c67436c61. 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/TR0511905859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x920405937d646314bb95811a0664d74a8563ffc7994a0705d97985f0d9cdff4a. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/TR0511905860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e3d399f6cc35be2cd9f45ee13e02835a625aab5a266174979afb3145e4885c1. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/TR0511905865.