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 0x3ead1f832f77d1773904db7f70de3a5d267070872700ecf90a79c5d271167587. Chain 2 (Bitcoin): anchored in block 953750 (2026-06-15T06:12:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a662cb2f-b5a2-4aaa-86a4-f9543288b395.json and https://artists.proofprofile.net/proofs/artist/a662cb2f-b5a2-4aaa-86a4-f9543288b395.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 0x32b412ccd740318874aee39e9f83afc9f0266c3caccdd2d4ebc5d6535c5e8255. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/TCAJF2551632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae0e25a63ad96f0a50267838def53e934c37473631c388a556d6d9a0e23cebae. Chain 2 (Bitcoin): anchored in block 957776 (2026-07-13T00:05:10Z), 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/TCAJF2562197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18ff048a9754ce83bf27787cd9a4c5e3dcfe005b338b346eeb45566ede98a5dc. 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/TCAJO2599113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58f078ff8fc10002f3a4c0c6373da7875b4d7b93736c980ab6e7ebc4667f4b1d. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/TCAJO2599061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbca792e7b4db8b132d667d1bd4693ce4f8f568e9017a3544772d3173952f6768. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/TCAJO2599004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef5efc6697d1405f6e7a1fa1c3e39ea7c778e1bcf2b0a12284753ff28259b3f7. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/TCAJP2596443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc00bab156cbb3b6a0d14375721c96a5c3110e7003e76684aaaeae8688e8df9cb. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:46:34Z), 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/TCAJP2597164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8c1a4e0a4d786ebd90ea7373700d17e102fca328cd1a73f0fbc02717c1851cb. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:44:22Z), 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/TCAJO2597092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b13c793260ec1ffee44bef3981718b005e90d49359e8b8bf09411fde8f8bbd5. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/TCAJP2597350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a885e68c5d26155b0ec1a554fe5c88f91b83c9b631369fd0ead2e2f8345ef8f. 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/TCAJO2598939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16395ac0cafff5e7540009f56b92f51283a5a4bdd9c827b91b01edccff4228ba. 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/TCAJP2597261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7911c01a3381d64713f4aeef4e861dd8e5b492a383160e805e04da81474039e1. 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/TCAJO2599100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x160b0fd0fa5dc95b89dfe028659f82df223f2251f406a148559968a15e5d0e4a. 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/TCAJQ2586933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x161cb35e970bf5fccebe9231912e24b03992a1de34ad29dec683aa1e078c1055. 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/TCAJQ2586968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69ca57de3e8c6882a31f7635ff1a54c8540191ac5db0251ccfe5e269d45182c2. 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/TCAJR2586811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4582bf4cd7fcef7f36591212ea2941b8dcec798ff84aee406d92575cc83ddfe. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:26:56Z), 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/TCAJV2549069.