1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → block must exist at that height 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 0x951c464b7fea86403ff554472970c2618695b3c8d55b97d3f187bb363ff0e620. 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/ac57cca9-3206-4983-9a92-4b0755abde05.json and https://artists.proofprofile.net/proofs/artist/ac57cca9-3206-4983-9a92-4b0755abde05.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 → block OTSBitcoinBlock must exist at that height 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 0xfd9ed6d0d277422228f8792c1d31903bdfb8e86ce2bd8170fda84e3b01dbf5df. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:09:17Z), 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/TCACT1622416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fd31a97f5e3befb7b35359cc2a8294c51d721e5b2a83611765335f4325baf25. 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/TCACT1622422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4d2af94e6aedd84391ad31916e6f38752a07fb6fe5c72cdd9958c55634be18b. 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/TCACT1622430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf93e29ff4cffa53eb1b0f39c91f37d4be26d5f3497a3f314bae5924ab98d7505. 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/TCACT1622431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd75ae7fc361c8e99bf956b9887594b9002d14d535d56e3d3f4f86dc6f3fdce31. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/TCACT1622433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x307ebb15a48b608bee42f8d67f9367f97330deb0296dcb07709c44f19b2dc14b. 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/TCACT1622438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92ba0985b4dd411258bcc0d6f7797100bf7fe8b97d878b19e19cd88db076a507. 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/TCACT1622443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1e12e6bc3816424984ae2b050eb8283dd4b0a94c49f500f347141c85e7cb7ba. 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/SE6SA2441773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x760b9007a02b0c56076bf4ba11c42289572e5d643f9718b9f3df1b8c51136f42. 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/SE6SA2441779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x627e80afdb4eccbe86d7c3bce56f7c1d4e19381326f778d24315c1d961b67f9b. 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/SE6SA2441781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5222a9781b981a1360ab94e51279ca43851fb0453af416aaa0c2c36d23fbf06. 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/SE6SA2441783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1caa2ee483ac15d91e6aafad2dc8714aa36ef74e5cbd0f62ca27c1b03b0b8d5. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/TCACY1791725.