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 0x9acd4623a2861ea4ff57f6a93a985bf71e4827030513870b0b4b9176cfd42db7. 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/08e9e3d4-c613-48cd-a2fa-04c41c3840f0.json and https://artists.proofprofile.net/proofs/artist/08e9e3d4-c613-48cd-a2fa-04c41c3840f0.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 0xfca24e89965e99fa78ada81c09ec9f382dd72e35fdd9a134d4f4eec40cba2b23. 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/GBUM72006726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c792d5ddf449dc04a9cdee821956c890cb6608801e62d1f594f3eb647fdc93d. 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/QZ93L2032576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb5446fd1beaaa079c14a415f8c0ffb0f63e804e2bcc7b98db9abfbdcf76a344. 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/GBUM72106927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x925c9496c015aaf7944426e02943f024feae72842aad4c18ed0039a301edafcf. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T21:34:21Z), 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/GBUM72201882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9934f425e23ae46aacf5c851c565ca58487c1d1aed343b2a08f4b423c701be94. 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/GBUM72203600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x680469f5ed4c6e4d7f782cdbccc3f121235cd26ec3551c6846b2ad62595490ba. Chain 2 (Bitcoin): anchored in block 958697 (2026-07-19T07:58:24Z), 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/GBUM72205151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05c5a4114bbf11465e6ab110e632b652d14782dc598c246bf6418c2c8c27cfb3. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/GBUM72203604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x241599642713f846b09fc5dd39e573c3e4a656cb1ee1c2e9d57178643b1bf966. 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/UKXN22325313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31b75c2b3acc6439d44d53c959fbda2af2e9ab52b6a95b68cb8dd42df36613ff. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/GBMA22360795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe298eab51e4e8805bcbd5ac7120756c3c42534a874f5eccd112be9fd0631c642. 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/QZPEW2451292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x241599642713f846b09fc5dd39e573c3e4a656cb1ee1c2e9d57178643b1bf966. 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/UKXN22325313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd8ca15beb8496e41c2c74b224983a07461e19c23fcbf0adc90076328b77adf8. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/GBMA22494440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50bfad2f40781a93dc6b00ec5955f6d6244bc2c1431ef1d0782d8bb6524983d1. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/GBMA22360796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4103c646dccf960cb08650c9269faa215d78755092273b610d72e834339635d3. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T01:47:42Z), 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/TLVEM2402964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4edbf59b73c08819a89500fcbe8ce8b243bd758eb65bd0a27ebd67366d91167f. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T01:08:10Z), 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/GBMA22360797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d3c250470b389383a3f042847f5951dc4af221428276a40351178ca90965906. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/GBMA22360800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4a4ee71d78b7efe7f8500f14cf95174f058d65e4d5a6152ca04f9aca6726b7c. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/GBMA22360801.
Another Sundown (Live At Hanalei Strings)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c792d5ddf449dc04a9cdee821956c890cb6608801e62d1f594f3eb647fdc93d. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZ93L2032576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb10ba98376859d184a40dccf6cdc9878a9b2bd755625f5c4ab4fc2bb52938a0. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GBUM72100225.