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 0x7cceec499e5d975f958528e076c0c66d472191b7717b032761db1d60c1881ae9. Chain 2 (Bitcoin): anchored in block 953762 (2026-06-15T08:21:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b6d6284d-ecf5-4b4a-b19d-785d46550ed0.json and https://artists.proofprofile.net/proofs/artist/b6d6284d-ecf5-4b4a-b19d-785d46550ed0.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 0x47b19aa9c3407073b1aba8b243fb4f49bd2ed8bb54b42cab1bb84f8d6dbf1ad5. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/TCAGP2242220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50f5235a77c5dd70eb2e7771939f95a089146ab9b4d4a37f176c2b9c5b0dbb86. 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/TCAHA2306494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6c719111212ac286d3956c4a9ddbd0b55b92853c87629790b562043c6570b2d. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/TCAHC2382608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b8345f3ab343957738ffe6ed24ab14263005a187c837ac16409be55236de3bd. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:35:50Z), 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/TCAHO2393515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe269c2998bad007250a738ba277a7d5fb95e40f5fb5fc42041527c051f7ecc77. 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/TCAHR2397307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d20c44203ca212dea5c626d8e28b583583d0d74746313bf7dab435de4a8a47c. 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/TCAHX2423847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3f5360ffca0c9c09455ff7fe9be225a5dcb083e7ff34350ee0771d1347fb284. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/TCAHX2485922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x430ab736d4dcb88f4eb6df53e55ada64a707c0239f32f94d46c6006ace41ca94. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/TCAIN2446850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99c7307ca1a816827232bf4c1555836f672ee6a31ea4c95c0d831c86414e5dd5. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:44:33Z), 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/TCAIQ2460315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6c58e28c5e2085353a65c27e56e219779e4bbec9eedb57110227c59acade790. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:30:41Z), 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/TCAIX2404632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa458beb47819c4dc3f28aea846d8aed25a90f899f27565f5ea3a87e244fae1db. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:49:48Z), 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/TCAJE2506754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e4e1f5928548b9e7f79e98bd7c8d295928317923bbcd68376f5b39f25fd14ef. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/TCAJT2530289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3591e1c4db7844d82515fb37acfd0368c401bfab4dde3b7797bbfaff33cc9576. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QT6622590945.