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 0x1870d6e84966d1ec90841055d3c6e4c395b9059ad018d04c4c5ce23e245f7cb5. 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/3f4b459f-6fc9-459d-8074-bcfb5ef11425.json and https://artists.proofprofile.net/proofs/artist/3f4b459f-6fc9-459d-8074-bcfb5ef11425.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 0x79760ed70f69e3ce87153c4162c21289b6121ca9771d20e37e40cadb3c35561e. 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/BEX501950001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebc1969159448c893a6c92a7eeeec9eb9b91f4a0042a7c09efd443b3af5fdb9c. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/BEX501950404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46136eab1a395b72fc7d1c57341f07966f4fa4e7735d1de51e48bd16f0d6b7e9. 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/US5ED2101452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9467d60bba1be786f69dd7a8d2c96d7d9d7017b49c32eeeb6c879bedbc8be3a7. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/FRD9M2300610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd2dae1ad775178d4595358a25dc24a28e858debca9bfc5aa12db58fbbfd5c80. Chain 2 (Bitcoin): anchored in block 958816 (2026-07-20T03:51:05Z), 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/FRD9M2300430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd64b86c0dceaaa0952a95614a9ec982a78943c0c5d8a58a49e59d25e7d10b60e. Chain 2 (Bitcoin): anchored in block 959013 (2026-07-21T13:39:11Z), 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/FRD9M2300630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5bca8e569d87f04340cc3274a1e466e82cdf5864212cd6b59189b10505cecc6. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/FRD9M2300640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e49747a9f75eaf0c1618a40234ccdb7096b90530902b173df7952f386edc5ff. 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/FRD9M2201080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1cc0f3472ff45dba01123f7eeafd3b0110d38ffdf64d5f12766cab7491966f9. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/FRD9M2300650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbf754fe1e20b0fee1c5a1f1ef7a23fa5943595936bf79b4e500ae76f2d24d69. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:02:29Z), 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/US23A1573527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b5ee54207fd37f51ce76f5bb574f07462734bf02e6e07227c8cfdd230df8861. 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/DGA0L2461254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d741471af181cea9f71f8539bdf7d3d2368107bd9fae779f80197e01be9dfaf. 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/DGA0L2461255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x564f63690903223c97738b778eaa0f4a354a0966398ccd2143214721e62e2b88. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T04:55:29Z), 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/DGA0H2499314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ad53d60c3890b6c702a308879ea8c9b7935974c5a7c4a528dbbeac4faa25328. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T23:33:42Z), 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/DGA0H2499316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58621f1290571c987892f2d5edc8dffc93bbcf9aadf4bbc23d6cb52cbc54a8a1. 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/DGA0H2499317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5018bc1d5c7ea0c4007ce091e958d9aab29c5424dd86515edef75448bcc52128. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/BEUM72200121.