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 0xe83bf8ffdabeac2aa525e64785fbf173399b0bdc8770679c01d2fef3f851c531. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/433e573a-2d09-4e9f-accb-3094002231b4.json and https://artists.proofprofile.net/proofs/artist/433e573a-2d09-4e9f-accb-3094002231b4.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 0x4dfd397c02ffcb9f19ad0a4de30bb6d776b54f9380d560ddc415edcd338b744d. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:06:27Z), 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/CAENV2211878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4accd79ae37ee670811997cbac32908fb310fd0cca56c0f7352251b93418edab. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T14:02:09Z), 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/CAENV2232344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbe941d136bccd841b56a1a0a0f557ff1816debc3ed90bc0f7f89b59b4eb21e8. Chain 2 (Bitcoin): anchored in block 957552 (2026-07-11T10:04:42Z), 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/CAENV2270421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x592c70ae8ee8fdc2562348c090a80c3f3d0e571323162d808799654e5ad97491. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/CAHQJ2306697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd3b4314a2273f2ef0daaa0d2493aa337e5eadffa2e061c4f146cd090439467a. 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/DGA082369331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffe78f024f044dffa460854e56dbcab2a703e3ad20cd12b6dcd812d993a1f211. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/DGA082369332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e2169488f709bfaf64af8391ac37cbc1389115ef73503b4b3ac8b799d08fde6. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/DGA082369333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc139636c10406f65addcfaa7ac48bbcb8b91d425aa30e47b1aa8f9c707528b2f. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/CAHQJ2412389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53e3292f534ea95dd2afce6abd12d81ae7abf6875d700389f70177c3581f0e70. 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/CAHQJ2483946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b32722c22a7c2034426a7dfc9e21a9bbc1330bde2f7d5626372a48f9347d94f. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/CAHQJ2483953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e59fc2d947ebded7876b792e79ba41fe12b3cf128de1f5187cf67ef6a6665b0. 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/CAENV2459523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fa1d2a0bcbe69e319d75243829b98dd5aab7c1d3bed3f1ad1e9e805dbd263b4. 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/CBEYJ2477506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d0906a25ece67794a599193271c6e1af9ddb5cdc634b1242e33dfcd5ea71e62. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/CBEYJ2477521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6502e27038cb8823b2a36960531d1e42c5477876a6fc867b6c52ddf8d27a5f5. 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/CACWV2570745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x080190fd2ade3ecf56fbd95337cfcd03b4d085b9a32d99a82085a64acfa6932a. 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/CACWV2570747.