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 0x2d4b4ee784bc35def7cef224382ec880038b880789094db421a749a5f2bd7d3c. 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/ecc321b2-dce8-42d9-a888-896a2424502f.json and https://artists.proofprofile.net/proofs/artist/ecc321b2-dce8-42d9-a888-896a2424502f.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 0x7917dd9554c5ec20b86fc4680f03d05abeb1a2ebd53fff9f96c9d26a4a75d440. 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/QZDA62006856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8ac3105e996c85969bef5dce5c5026ce7c2dd2c7ce8b8f817a98b7f5bdd1a80. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZDA82021576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee44661d076bfaa75dbbfea631bbe60d73bbbecbe61eb585022dd2b497916364. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/QZDA82021578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b2744b0512dfe41e23f92113966b1a60df4353896ab1eb6de2f39222cedef3b. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/QZDA82021580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaab1577195f4def58bc978700aaf8757a664409b8007b86db026c2c68461fe73. 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/QZDA82021582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93daa46b069e3714beabf5674d634b3d875d48db19d21bc0e165826f2a4d72f9. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/QZDA82021585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35b05113be31ad37bb6d19cbe6d4da69f2c253a21c43202018c69308cb1cbb30. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-22T02:04:45Z), 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/QZHN72045351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f67688c1a8d3889e6f61dec6fd53b3cb947fa9900935b4b94d3e2fd8bb20587. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZNWX2063049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e76aa04624ae2a5e501e32d3f90c1a4f97c8e03b3a9bb264b718d6654095425. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:08:24Z), 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/QZFYW2139857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad1516e6de216b232a3e0717d4a675a23b51d6d06a2097d0b331926219828865. 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/MX3602300013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3edaf16adafd33476f1a4728bb4b085c1955a4c8e0ddbbebd6dcf4453b64361d. Chain 2 (Bitcoin): anchored in block 958736 (2026-07-19T15:45:57Z), 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/MX3602300012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08fa1de9a80705a622d9143fdf93c1d0e223ab816e7724c8e0c43b82218b2672. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/MX3602300032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e86dd87171af8a71b8e5539db886b59f6bb9684a6b4c381d0c189b01ae4e995. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/MX3602300030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90904c6095b5388ab289fce9173c914ede0c5fedac6a36120df2b0515823a9c5. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/MX3602300036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29b9b25271e6efab1473cc92ea8b4b374ce03a0177c78e80c2b770a0c7ec4b9a. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/MX3602300031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4941563aa11ceab86e42b3079e28fb982d4e9b8b23d33b400da495aa04074b7. 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/MX3602300033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cae1396db137476e87814dc221b08936a8d6f349ca5610f7808897de9afac3d. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/MX3602500036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca94282dff7d65a6b240b3a4d2d124361c7a45c67669b9668cb301aceddedec2. 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/MX3602200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf188faf81be12d1aa7481f0ddfff5322212cc5f0f31c6f1ebdd6f7f5eb6bec4. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/MX3602100017.