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 0x36e26e80169a4264f5d42a61022823b19939457b58e5e62907f90c73e5b64375. 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/d0b3d6e9-440a-426c-bb2d-56dfcc0a8427.json and https://artists.proofprofile.net/proofs/artist/d0b3d6e9-440a-426c-bb2d-56dfcc0a8427.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 0x2ca4287a9cc585a3af281e5e246da46365deef3fd498e2feb10d26f2b426a648. 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/ASTOR4000002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24b0f884a90f5cd430ebb775a367aef63bff2b20b7b2c85ea8ca1f753a0f22fb. Chain 2 (Bitcoin): anchored in block 959091 (2026-07-22T04:53:22Z), 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/ASTOR4000012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e5cee09e5768a5228f66057f1a213a0ea24efca53a87191a0ce9d14f45b4271. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/ASTOR4000010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb99d002d77813ca1428a12de1db1fba5d77eda387740610e6cf7f6b1e4b949b3. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/ASTOR4000011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ec2f46f9b6a61fe3eeb7e2be601c4da708ba594cfd122b847252bd0adc8960e. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/ASTOR4000004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x611f2ec1c358a33b3b7df91c6d71c1962816dbf101ec80912d101cd6dd8d9da0. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/CH7812412853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9cc5aecc49def4c2beb1dbff79f59dbc147e45adb07298c19aa9cbc676c3532. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/ASTOR4000008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x011b3af4321a0d0f218f43f4e9bac396053feded353e4492afc6a8e58171625a. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/USUS12400482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b75d1f0a85d673e89de99596468f5147722578094d86d5f8bc8abdfff22e85c. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T02:32:52Z), 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/USUS12400483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b33edc279842705a3a00acdb8ed98c158f5a7a9159647ce982b276edfa5f7ec. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/USUS12400484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x011b3af4321a0d0f218f43f4e9bac396053feded353e4492afc6a8e58171625a. 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/USUS12400482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b75d1f0a85d673e89de99596468f5147722578094d86d5f8bc8abdfff22e85c. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:34:39Z), 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/USUS12400483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b33edc279842705a3a00acdb8ed98c158f5a7a9159647ce982b276edfa5f7ec. Chain 2 (Bitcoin): anchored in block 958706 (2026-07-19T08:50:34Z), 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/USUS12400484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0954dc34c4fcf81d95fc13a4e1b89777afd0469fc143eb4129cf6672b66f07d. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-17T02:07:02Z), 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/USUS12400485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ab0bbcbb397d3f6f03d3d939f32c5deff8c606f5d457ea5a025c26d55af349f. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-16T00:05:35Z), 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/US92U2400406.