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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6878abf363f9d5ba64bf563a3f0ab5eab920d71ca982b20ddc9f590b84ff57a6. 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/17c6ca3b-ef84-4656-b880-7e5fef001f74.json and https://artists.proofprofile.net/proofs/artist/17c6ca3b-ef84-4656-b880-7e5fef001f74.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1d78db9bad32a5c83f13429559db51ebfd7fababb15d424740b2ff00c15c88a. Chain 2 (Bitcoin): anchored in block 958656 (2026-07-19T04:04:08Z), 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/CALVP1922928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c56f800c93948eefcfd21b44116f67e50a77a8ae5618251eee464208bd2e93e. 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/CAGOO2043546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdec0221eee50e47082331ea770d679a8d7510bc68ea3c1a824302b08137c1a26. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/FRX452266865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8def6f428ad55adbf2545350328ed26cbf1d0123581ded640c6e8e7461239c3. 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/FRX452266872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x779eb0da90356bbd2aeac18b17f3727a871b74a1eafc1c5fcdd7dc733c2cb703. 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/FR2X42510210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32c8d2ac96e6b36aa72d272b2c6a8d9da821f78fe4ea265806d46c91c5b98145. 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/FR59R2469143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91b7134c6d013643688f8100bdb2c9f611740ca474b9779ca41dac9607b7885a. 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/FRX872442226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x803e9d8df81a24ee6dfcdcd7b33a3e6c4f816eb44e8878a32ea4c35b374c047f. Chain 2 (Bitcoin): anchored in block 958670 (2026-07-19T05:26:23Z), 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/DGA082342315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb963db261397f6f21f3bd40674f424bbe0703c56b6711a456c69672fe4b85f6. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/FR2X42510211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8af957fc66da3299b3ab440f7302458126ade9c9280e8f756a8df3d911deb35. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/DGA062301166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6670f23f1f30c98fa41b9d2edac25d60e1c1a57cec1d8edefb515500e0348d0b. Chain 2 (Bitcoin): anchored in block 958432 (2026-07-17T15:43:17Z), 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/DGA0P2349605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f642042be38b615597f777cf3554b11f536dc2f12d84e050c12de43abf90626. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/FR2X42510213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x331d5b11ffe9efcb8cbbfed0245832f3778c1151f98b9fbd1854cd22d39bd60c. Chain 2 (Bitcoin): anchored in block 958963 (2026-07-21T04:02:02Z), 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/FR2X42510214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc38461790f8d657effe382b683df86b730e1ad903e8c8a9f0aca649cd02777ff. 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/FR2X42510215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd9d8d426e4a65f93e2b79ef513e5643c8d31bc2e386420b050514da906237b8. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/FRX202537601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5285ecf726fc54ac7817fe921584cce96f9da82e4c92491252895b5153bc1499. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/FRX452522422.