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 0x74e70333fc404a548f66cb20fd368dc439ac8048bdd43cf279eb4a2ecb4f2179. 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/d45c1723-6223-4ba6-96ed-69a81e221d1c.json and https://artists.proofprofile.net/proofs/artist/d45c1723-6223-4ba6-96ed-69a81e221d1c.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 0x834cdebb38080a1ca13831994dfeee891e4a7b3ca7d295040d01e065276565cd. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/TR0531913063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6aa5d3f90eadda4d4dc950ce3df74096b46a9cdf7f2afb5a75b4c4bd65bff0cb. 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/TR0531913156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff6de6ad2a22771f7c22a18fd4b26e62bb1473ad9f53c2be1af5c1520004e8bd. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T17:47:12Z), 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/TR0532114187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x587d156fb4a6e0a2c544288d7ebb6fc98fbad733a73578b90e210504ca67903c. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/TR0532114362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbfcd60cf5686117ac5bad1f12e4a5656a19811e96ab5dd633c6d84f4a5e60a1. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/TR0532214860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x587d156fb4a6e0a2c544288d7ebb6fc98fbad733a73578b90e210504ca67903c. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T02:07:59Z), 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/TR0532114362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff6de6ad2a22771f7c22a18fd4b26e62bb1473ad9f53c2be1af5c1520004e8bd. Chain 2 (Bitcoin): anchored in block 957526 (2026-07-11T06:03:28Z), 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/TR0532114187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x462c6389fc4093f13fd0a5676a5b8b3b05c11ab9511b59a8c20cf5d42c85c6f0. 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/TRA162300578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea527d9c0d28c5d5233454964360c81700a1a5e82a6413d0c3c7814a89f29c60. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/TRA162500017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea527d9c0d28c5d5233454964360c81700a1a5e82a6413d0c3c7814a89f29c60. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T18:29:11Z), 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/TRA162500017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x617a3cbdb51468464339471577cd76879a611fd7dc7f77657699a65900067171. Chain 2 (Bitcoin): anchored in block 958106 (2026-07-15T05:35:13Z), 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/TRA162500023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x113d5d272842d408544a0e8afebf9d3276b0a0ecacb5a4f41d376a870b5101f7. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/TRA162500026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x878820441e470c9b963e076df7d9b1c454cf698ba48d89de60241479b0f15f8b. 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/TRA162500027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e20003fb861c1d92952ad0518eb809c4181536355a3fb7791d20b349524ca4d. 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/TRA162500029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0d5dfaf461b9216427e1c6932e5976ec86c762dd2d4edc3d29fb3a8ea5ff2ec. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/TRA162500030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33bad823db21d1df9d1e27d9c2e72e179d0533c5eaa53a00c3eef67e324c0f8a. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/TRA162500031.