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 0x1ad0967a56dd77ec4cb14b02d946cb7227ab975f0374c407a71a52842c12f99a. Chain 2 (Bitcoin): anchored in block 953782 (2026-06-15T12:13:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d54de9e7-3688-47e7-9546-9c901d23b84b.json and https://artists.proofprofile.net/proofs/artist/d54de9e7-3688-47e7-9546-9c901d23b84b.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 0xe3058ae85516a1d4db0932b0c823c1b868b1dd9e5941446179893a7859d3eae7. 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/DEZC12323001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf21feb7bc6906abb691c7d3adc38fef74459ae03baa3e7d325af5d6fb99707c6. 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/DEZC12323002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57bf34a11e4b1a94953282c2173c82b341481cc8de844a4da7a351698500a0a6. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/DEZC12323003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8f1d411685b7c1166a5f4ccf7eea0f6ebcc40e59a0c7dd5b87bb6b2676c4a6a. 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/DEZC12323004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8521ecb7b50767b978dc257f6c09c3bcec437f128b7ea3be9c82a6427a3c7b4. 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/DEZC12323005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x465348517462e4daa9f69bf06de62bb5b2d646e96e5f25f6b6ad593422f6d71d. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T20:03:27Z), 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/DEZC12323006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf393fc2f4abecfb3ec45176c0051298f06d43d41e7717380e814d4c516cdeee. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/DEZC12323007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51c2cb16f4cdcc9a17b5d0e9de668457450f1ce003ba8a53c78a6bcd29861e7d. 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/DEZC12323008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa78cccd159913032303994fe20e506eb32f184a6fc51aacd233b77608bb5f6a6. 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/DEZC12323009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06c12abde933d762ace97a87a1828582c898cc5858d12336dd64553901c1cc3d. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/DEZC12424014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd30692c90e669f8ecc93ad79d49ec0cdf16eed8872302f92e4f5b945a05cdf11. Chain 2 (Bitcoin): anchored in block 958720 (2026-07-19T10:53:46Z), 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/DEZC12424015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67540c4da3b50ea2d4197fa54e587cf539bc5b1a241e9db721779818a0d6dd97. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/DEZC12424016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde47fa37566a5f6b27f4c4a0f535dd748bc0a407e144127895b996af2ce86f1b. 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/DEZC12424017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9dd0174cc00aadc19b72244ca1d9ec87c125fac59b0e07e11b851cfb2ed8efa. 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/DEZC12424018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bf505619489dd1ef54b73471db537c6b7613824c1e42e7ea9d47d6ec73f8ca3. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/DEZC12424019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe26a75640cb02c24901f0abbdca985f69b34c3d6b481934b08520517f97fcde4. 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/DEZC12424020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe83a10d3ab423c1a61b8ae9bdaaba15e443191e3ac36d9446c455b986ad3703a. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T20:03:27Z), 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/DEZC12424021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedcc8e73495bf0dd8514922e0c48cc5f560148a8b60e0dd11fc6f9f553cb5d6f. 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/DEZC12424022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09af0c940f106cb13aa014a865b318ae1e63ba1fda576222a39f35bbfd8f8220. 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/DEZC12424023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0db874d65c3c9ee1e2ea498695fd41004ec2121d2c7db2e994bc34da49347656. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/DEZC12424024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x965832360e26afbc9116e4877ad9491dada6ae4c2219ae61cde7220d29e4a6c9. Chain 2 (Bitcoin): anchored in block 958708 (2026-07-19T09:08:25Z), 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/DEZC12424025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49ce54dc103adc37a6a4e66bbfbf4ba5badc7a3e2d5b1d0eb8295bc11644e84f. Chain 2 (Bitcoin): anchored in block 959091 (2026-07-22T02:33:54Z), 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/DEZC12525002.