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 0xf7a532cd50cff8f71b26b8666c20d88b133e9da67c474382de58aa0887171ec5. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/309e49b9-1cba-4c1e-8b7c-0f47666b5bb6.json and https://artists.proofprofile.net/proofs/artist/309e49b9-1cba-4c1e-8b7c-0f47666b5bb6.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 0x695041b563f601872572c72aa5cc940eb28f9c143482fa193cc53964a6364098. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/OP9X98129054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7926e346e89d3d48ae9b7049e18841eae66dc5823ce0a2e33e0a947cc295bc7. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ZX4P23950023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01f9ad724c2871325f2d2338d368bee0e9cf838e547cfa32b157410c696c5b16. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZZ972460157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf657bd34426f68dd396a49cc5770006d6c12f10ca552b23cbc00ab93fabc18a7. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZZ972460494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b4df1bc33f3de085975ea905df90d028d40f1b98c0811447f781f24d7cda620. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZZ972460495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84676fa78b37705c1660badd583d53d0ffe066c5406a1e4130b612c3653f38ac. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZZ972460496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x366b33898b1566321661d8ff79469507ea881c734cae9b926d12f807f8f72744. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZZ972405409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4938ddd54b3e3d6d74f1e221e11ec5279308a7ef70ede06bab85fca17942b3e. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZZ972371364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98e78a64615fd8b365a33202a47d6b373266aacaa247fc182e87feb5fed58bd7. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/IEWGI2367607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x658acda6135ffd483402084e8bf30022ee6b187b065b96ac6d1132e79731e8a5. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/IEWGI2364536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74093d046c5192ea6015b0631171effbc42a0650bd1446bf64c0c903bd149f9e. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/IEWGI2343228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39c5965a3bd9ab7c530b7295ef2ebe9a54af0df5c430c957847a7bd0c68c56cf. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/CAQOI2300530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb2fbb4fe1f5b2eb2dc2e0e196d0671da3b615f64c8b5c5751de885628c7cc7c. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZZ972464235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c6cd01c762b579ca0066301e25064d44743727b29431ba3ac63303d94ce5d1a. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZZ972453609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf606ada53c877cb276a7714f4335bdc48ef3033c6e9b8b45bd0298215894703. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/IEWGI2313832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x304f76ebb992a79b741f2192d180613e7b159ad38ea1c14ae53f36028b812db2. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/IEWGI2339530.