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 0x084d5dafe8729ac909ddbf3c80376bafc16ccaf10c606c7b47a390d82cd87a1c. 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/3c08ed29-544e-4fe9-8f2d-3af2eeea3281.json and https://artists.proofprofile.net/proofs/artist/3c08ed29-544e-4fe9-8f2d-3af2eeea3281.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 0x55fce1ec3a032808fa453cc0f679b5b65b7c373924c988c12aef09b4cc10e368. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/GBSMU2461470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc17c4ea220b5b786bc03c7725e3fbd794b9f8d6b3144b8979c2e7bd1ff92b449. Chain 2 (Bitcoin): anchored in block 957744 (2026-07-12T19:15:44Z), 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/GBSMU3953907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54b2ab2881a14d5b1e672ce7e894fa5e5af77bdc91b946174989fecc8ca9eff6. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/GBSMU3953909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1020d7470f1f5cde986d241bc8a86fa9a1e7a77e508d77d7c60253d5d39a8c6d. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/GBSMU3953910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce176f129d77afc08146ded7230ddfb92592719b50be4e74b5275ddfc4ff20fe. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/GBSMU3953911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa73ec97146bac3c1432c83ccae1020ad06f7a9bbce7608e9dd3f2caef3c391b7. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/GBSMU3953912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x193b06e3fb2b0e88b0067f31bacc519afaf1a54800ecef13c44a9f8ae353ab09. 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/GBSMU3953914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bf33223ecc7991446837ad212e554481f5556b8e176f1b588ce448c711cf400. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/GBSMU3953916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02345555fea8ec8d5b977f83e3a72fb85594b5ff65cb53773750c63f1d501475. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/GX5MY2115659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x965f1d6172d1bcbdab3925baeb56d0d0c5833c3870e841824182acea72312c54. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/GX5MY2122888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cc582825260a79722190619a790ffa4c0f35d878ebb2da2fce085dc2cab2f48. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/GBSMU0138399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca2a1fa055016a7af133179b2c1aacdf25c9fb17cd56f9c884dbc77ff10e2619. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/GX4R52357185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7582df73b3a547a367581a3c4759bc0211747826bca0b9a944989196e69a06b. 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/GX89G2405192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9541ffe0a8d4240620750a3891b7db2ebbaca0c9ad55baca57459b72ec52ed0d. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/GXF972450674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42c4712f6676bc35ce6c4ad6f3abda4bee4dfd5fdd5388aed321bd82edaa262d. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/GX89G2584077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c59c32c6ba293ef118fce451d7037cf34db7de0a34a92599045a6a92083d50c. 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/GX8LD2538200.