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 0xa8ad08fde4a61f2d5cca789f77d3b8c0020be5f3e2a680ed7447410218ec2d9d. 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/d1ea5933-2327-4b6e-9667-94c77ee41a5b.json and https://artists.proofprofile.net/proofs/artist/d1ea5933-2327-4b6e-9667-94c77ee41a5b.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 0x5b9d3f75e2801f778142c5ad66122ae0468fc9bd2fd9f4244d9122e90ab86e54. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/TR3270700057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03f53f3c09f28f27a56fe408f8ad994baf2fa1338eafd6b51bb8a328c6676262. 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/TR3270700058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ff14656a9ad1e1810dfc0921fc08abb4b20281bf78ff6247fa7e32a3ec13574. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:57:41Z), 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/TR3270700059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe60d1b05f5f2f81482bc35f43153ccb8b76eaa007a7a1fa9e73ed5d41c728c9. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T18:55:10Z), 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/TR3270700060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40e238827cd0aa2805d458cc41f2bca320f7aeb7bd83cc2b7ba51086208152f5. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:51:30Z), 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/TR3271801005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2296917edc455c86eef8c4ec1683d371a4f6a455c313e8d02b470c932fabc744. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/TR3271801008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f2ff2833b1f1e28fcb071b813008ff250d5233c8922252b2e3090b4ba5f63e4. 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/TR3271500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23ba0a61f82357dc701d2aa4dac75f126e25a9ecb48dc044ce030668e6689aa8. Chain 2 (Bitcoin): anchored in block 958971 (2026-07-21T05:04:56Z), 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/TR3271500008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9aa9c2ecd89e9e9ec56c65b6c88c09d0fc0fe20556bcdfb25f2c8020aff043eb. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/TR3271500012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25831feefeec1d4ad7823bf98b7a0d9817ffef5a3e1d368492de5c828b00d28e. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/TR3271500013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf45361260b5ec994f4715b9c9ef02870980e6b961d9787a0d38213e5fd8d91b. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T23:07:57Z), 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/FR96X1706644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d4428868b7621f176d61b700e55d7a903dc0542fac0685eff44c5e9eeb4de2d. 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/FR96X1706647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1584bd11dd9e908b2cfaecad8513ac428ac0577b849f032cb19d94b315d4293d. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/FR96X1706651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9c7571e241006c9891944a032f62a306f67a99007139c7e596ec63b2108806b. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/TRBIR2201508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fe3c4ae7284bb4246007c3121f94def58809073a77244b4dd84cf9809a00332. Chain 2 (Bitcoin): anchored in block 959091 (2026-07-22T05:20:14Z), 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/FR10S2406548.