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 0xab349b0e7b58cfe947a9bf18a2cbc73cb6610a319f073828e2a440a0c8168b42. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b381b948-6238-464d-8a4a-e38d5c9fba5a.json and https://artists.proofprofile.net/proofs/artist/b381b948-6238-464d-8a4a-e38d5c9fba5a.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 0x5433da836a2d53f33aa193045c8de069b44a56824a4d5475979978bb2e7720ca. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/HUB282301249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43ea76c2b2345e0ca5f695fde70d54bbe5fccbb818afe357e6cfed56708918ef. 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/HUB282301250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07819ea862fa63a60252f0c05bef2b1fa15152415dd64d5374cd4881b105568f. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/HUB282301251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0e7ecfc0cb345183c3b54043a1f40f92e5bb78434bf0225ad03a0cb4e7ef05f. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-20T00:24:16Z), 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/HUB282301252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b8ad24fbd9f246f3cc51636559c6cfdd60116cc8605ac43ac5a5440932905aa. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/HUB282301253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x563993c790b2b4d9f02afc13dab10decfbee4c8f8f782810ed292ebdbf1788d1. 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/HUB282301254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b4f941f03401d1092c5bb4f2a8246501abe6a962bdc1b646f05450fb5ead4a1. 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/HUB282301255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8d26f0f4e0ccbbc7a117867548142accf27b948c04fbb6ef307cb0710784f1d. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T12:11:30Z), 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/HUB282301256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0957a38993e935725ecef85908771f3c810dc610f839059f6eed5df070117807. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T12:05:32Z), 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/HUB282301257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f42ff6d4bafd5af1ee18e61c086da27785b35129bef6d74ab198e8089a06c22. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T23:35:59Z), 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/HUB282301258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcdfcd192f63f93d1182b8ab345d7a19c69ccf7d0a161ce62d182a7005694295. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:11:23Z), 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/HUB282301259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5abd3b671c534f343424e871885ffe5817c9e3760e3f7c7ec42f6e2ccf2bfe0d. 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/HUB282301260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd99a5f1913f0d7b86c0c9225149fcdfe41fc890b56ec2ee784f5292a070d7321. 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/HUB282301261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d37ff39b4d49c18bade850ede0d79a6cd801b5dff3fac0af6cbb3896832526d. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/HUB282301262.