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 0x44de3d5e2793580c9cc791b21a39290f20f839c3b1ac5aace35d5ecc181ea8d6. Chain 2 (Bitcoin): anchored in block 953759 (2026-06-15T08:04:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b2f23648-8e1e-4a58-b439-5800e505ce4e.json and https://artists.proofprofile.net/proofs/artist/b2f23648-8e1e-4a58-b439-5800e505ce4e.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 0x34622134f40142e3698f681573db53fbc5fe1396051b198b6bf3fe9342ae4c64. 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/DKQ4A0700902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5145f199a60f8e9badcdfb904b2aec1052d76831a100824ab8e8bd6fdb73b9e3. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/DKQ4A0700908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10919d5d3418115319ebb471104656aeb2514310335afa1bea6ca055c62fa7ea. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/DKQ4A0700910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd32d02ad6cff23485a3e59c086e44575b4e0699228f11602131fe0a23a172570. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:55:08Z), 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/DKQ4A0700901.
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 0x6721f6e66d59a5c3ea8eb48bcac31c1a41e7ef90ea472bb7c75fd093a748a45f. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/DKQ4A0700903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d6bef03256ff3a7a8ae3d43f796dad7e6d5df10849481fd3a3037349d7c83fd. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/DKQ4A0700904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7766483dccc837f5e76a4337979ffdee85578ef60c7be95f480cd3d22050c83c. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/DKQ4A0700905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa33c799a3925bf92f3bd2fa541d1c9135d8ade110c190d74c6fe5efc240defdc. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/DKQ4A0700906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe976b5b852c98c3604ebd681883d6222ab8e380b7032ca9314bbe97c8fb2edc3. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/DKQ4A0700907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5608ab36982a8a06c6b436f04f8346c159ebe352237ce631fbe18d7e09a71627. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/DKQ4A0700909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5442f7a36f43bb3a31b2900c1cb49e0eb25c2e606e5e7c62024d8f0b3a30fd3c. 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/DKQ4A0700401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfd5613be0b4d3817a417b0a3cfba149ec37c0abc57bad681ca37f2caa82f022. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DKQ4A0700404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacf46e305f9fc5a33d5d83abe984d63edf2d8afcf750dd43e78e50a09cc7a8a2. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/DKQ4A0700405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2309786d5eac8fc7bfe369053349985d00771a796e0a2c9e593c8fff284155d8. Chain 2 (Bitcoin): anchored in block 957055 (2026-07-21T20:39:26Z), 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/DKQ4A0700406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51fe30e4a5543a774492c16b0b9d80dba170cab6f496f4627636ab87804821cd. 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/DKQ4A0700408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d63ee287a7a8d4697c6473afa18f67e98a192887a2065d795b9410fcb006d60. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/DKQ4A0700410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x802f716a8eabd2375af37035dc823458947fd9b190421efa120b1dcdf557369a. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/DKQ4A0700411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c4c6b075bef536a1383c3479aa11c06867b09a81c60d31efab6f577f88c4cad. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/DKQ4A0700402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4212cf03c62898a12cbcc2c3bc18f28d5684298b1acf4eabd67b83a275e6e6f7. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/DKQ4A0700403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xced7a01e0429e8d5add6ccd46c6f412f05549243c7a54d82b897bfb73faf439c. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/DKQ4A0700407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf39a150941c2fed65a5febde2983f42a91b6c9b5c6ebb494053ff2c9da59d060. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/DKQ4A0700409.