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 0x7582e8b2bedcc48a778a1ade9acf0ff47a9007b40729349075de5ddc92e91525. Chain 2 (Bitcoin): anchored in block 953694 (2026-06-14T21:38:09Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6fe4a1db-41a9-4bb6-9f6b-4e0088afb712.json and https://artists.proofprofile.net/proofs/artist/6fe4a1db-41a9-4bb6-9f6b-4e0088afb712.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 0x4b4a2abd9a2343465ed361bbaa9460eea9b8b3200f096cdc802075bc2ec022c9. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/TCAIM2452785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf35d3a72b887e841992d88a60551d0a49b1a2e1a80271fc572eeefdf1b4c1c17. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-19T22:07:06Z), 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/TCAIL2452839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad84a59cf8fe948c39028383849fc288de42ec2e5e79f7e46ce9c8db6f4dfdc6. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/TCAIO2450820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe07ab471f3445dba24c39b7328601e13422a0220c24da7079583ac9800489546. 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/TCAIO2450876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x531cdcf8e9d3356d3234fe1c39b1d80349590440a9ac68aa9aa15b2ce95a3425. Chain 2 (Bitcoin): anchored in block 958731 (2026-07-19T12:35:36Z), 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/TCAIP2416078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x531cdcf8e9d3356d3234fe1c39b1d80349590440a9ac68aa9aa15b2ce95a3425. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/TCAIP2416078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8a6016114109e2b41ce779c2dc1b2f5188daa1ea63541bb04974a506d05ba51. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/TCAJD2585171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d4fbb49e9aff40975ddb671a5aab21d2d75eaf11b0c7c6d0aad00b370b90d43. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/TCAJD2585183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe07ab471f3445dba24c39b7328601e13422a0220c24da7079583ac9800489546. 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/TCAIO2450876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfef7cb8d001e1a523a184f9d81e7e70af998128ac2d454fddb1bc3ceb67eff0d. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/TCAIQ2476990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b4a2abd9a2343465ed361bbaa9460eea9b8b3200f096cdc802075bc2ec022c9. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/TCAIM2452785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf35d3a72b887e841992d88a60551d0a49b1a2e1a80271fc572eeefdf1b4c1c17. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T18:19:00Z), 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/TCAIL2452839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3fbe895768755f2352d0de9e5317568d9f09f1cbef88baae8e34abcdede0e86. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/TCAJD2585268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad84a59cf8fe948c39028383849fc288de42ec2e5e79f7e46ce9c8db6f4dfdc6. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/TCAIO2450820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x363dba3ec84f8bd6626cf446edd34da714ff1b73a94a9fce9a312249033f995f. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/TCAIR2416134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b70d65a64d6c45a1cb721671eccf967909707793484c5c42adb6e036d6a8c94. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/TCAJX2527000.