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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab08dfb15b05c13b77cdfb77d0d8658a865b70fd6926a9fc70dacf4756569a30. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/91b06036-e6a8-430f-ad51-56ce29a3dd96.json and https://artists.proofprofile.net/proofs/artist/91b06036-e6a8-430f-ad51-56ce29a3dd96.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x228d31207d750a30a144a08ac58433c0a0ab45988f88ba8bff02c60d19e234ca. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/USCGJ1910256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ea17515bd5151ba73b856ee3e4a0e4c44cf05111edba77565f9c542fa966c57. 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/USCGJ1910257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad046168c18ca82aceff6407e958c0379c190873cab227df540a2c0b06a258d0. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/USCGJ1910258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x535f75d3a7b61e024d3cbce73c101ed903c0bdf3f42a7fe7e201bc439d502537. 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/USCGJ1910261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74e4250377c1c0ac4ca8eb1b46cd3ccc0c8efb201ad3cc923796b988b9984a27. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/ESA011731128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe50fc65260b88166e27ffc9e7033c3d8d1980517005e776a82b732f25df00902. 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/ESA011731133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e01fb43ad0451837ea670a406df659c51d14e7f99ea8b7490bfc039b42c693c. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/USY252335242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fbc01d8ba332cdb55efa3a9e803eb11429a1051c5d19f8f889aafc7ba857481. 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/USY252335244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3addbb2fbc28ffaa2bc2949e3d68077d547ad8438ef3e7c69f32fa8f2559757. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:11:38Z), 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/USY252335246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5f293ce112e2316db2b1ada7af0ce1d005bd090e4f885c5d05b91b2079d68bc. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/USY252335247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc32bfa7df67d6f2580f8c2d6a868da1b3ff6629ef50c24f39e1b457ee0f2402f. 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/USY252335250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f16d0063304e7fd42c816c0f09dc583dd0e954c587da7313a9f3c64c4a653c4. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/USY252335251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x566c349ebce50cae28ee51447a6d42ebf802e7612080b4f67df9904861e55632. Chain 2 (Bitcoin): anchored in block 956485 (2026-07-03T10:53:04Z), 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/QZZ7P2425768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeca87274e4f0da7fac39168fcc09bd557a6d0d04187a46a4f94c5b00dd61fd21. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T18:35:18Z), 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/QZDA42522143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x566c349ebce50cae28ee51447a6d42ebf802e7612080b4f67df9904861e55632. 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/QZZ7P2425768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeca87274e4f0da7fac39168fcc09bd557a6d0d04187a46a4f94c5b00dd61fd21. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZDA42522143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x754d4d94ecbb3405b16dcda57375c74dc855d342cf64fd04271f608d6270e872. Chain 2 (Bitcoin): anchored in block 958554 (2026-07-18T13:17:01Z), 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/QZDA42522144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1542d9eaebb2957273e55c987a4526c0137f01606bff166f4954e5917e9b8df. 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/QZDA42522145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb92465fb28cffd3c15d8799be56768c0524db4d16c7d0f8ba6dc29f6d5069c3c. 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/QZDA42522146.