thumb|Groundation in concert in Brussels October 20th 2018 thumb|Groundation in concert in Brussels October 20th 2018 thumb|Groundation in concert in Brussels October 20th 2018 thumb|Harrison Stafford
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 0xba528be88f561d0778b36d8e07a0838a1af30edfc7e61bf6c5a45f463260f60f. 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/672b972c-d552-4e65-884d-db62325b635f.json and https://artists.proofprofile.net/proofs/artist/672b972c-d552-4e65-884d-db62325b635f.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 0xc44be1a71657734876dc9462c84d9a738b82a79abaa7508360390d5767d34639. 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/US25T0611219.
Freedom Taking Over (ft. Don Carlos & The Congos)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x620ecc2ff913be94d18e15ef5af5cb1f910f67f6239780fdf4c938029ff6748c. 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/US25T0611225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b9e8533eff14215c488813f78df5358d42119714b43c3e43aa7d30a48f8c7bd. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QM7282095929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2e6004d382ede94f2517abb5fb6a69e0a6dcae6914d89e1a2b57372c7db2925. 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/QM7282095930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x045378f2b76d866cde6cad0f0b96daa336cf75fe1054af678b3abeabd891260d. 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/QM7282095931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf8cf2ca8109ddb415d35afd11402e5a75cd59b69ad719309abbae17a8064413. 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/QM7282095933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1be3def7de88d88b174cc30f8459afcacf53925e77d13bc3785a9209634613e. 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/QM7282095937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e1330e6619d2d93d1b63c057cdf536581b1539cd79b93383a06493d4868ce7a. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T19:51:29Z), 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/QM7282095928.
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 0xd286864942dc9f0da9914dffd0192bd8f8074afe22ec86c26b55136082ddddd1. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/QM7282095932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7af3a6b4cadc48bbc19dbd15f4ca5381e69d90e6f69bfeffd70bd813f0dc38ce. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/QM7282095934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36a76f6550c92c0f04cbdf981397c76f4aef204870314baf5e5d4d09a61be962. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QM7282095935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x699b9a3150e3502720ae92d6269477a9dd143106699333d22b24bad34b7899e5. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/QM7282095936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25dcbf6bbc5ab69a6de97ccab7d24f360a0552c3dde46b3a922e14ac78d2c4d4. 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/US25T0617034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb88d3c58e27ac08ee4a6aa60c3cc9a11103efc8ba81713661682e4ac2b8bdc17. 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/US25T0617035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb7cc70422de6d91a3c947aa112549dc30219645998f440d8f95b994ee15f1d1. 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/US25T0617036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x643afda674faefcba04cdca134e61645db23d061207fe69c145b7477d01fd6f2. 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/US25T0617037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62b2c315deb4978b4af43478ac89191df478d540ed1d7e7a3a99ff7e1796c30a. 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/US25T0617038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf77a6d4808e004fe566429db83c64af5d0c93d004fca3d9563857dd8c5d889f. 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/US25T0617039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42679eaa12b3c90f12975b7a502f9603d57b9e9ceb8a3e410078c753d3c821e6. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/US25T0617040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb772e1ab2f2dbc098eaf933763d13d4f02df7812f0d12bc7da3b3d22e1d5d9af. 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/US25T0617041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa7f54ca355cc431d35a3f27ed07127e2dd47b0ab9db26573428567d6f8aa410. 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/US25T0617042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b8b91a524c502aabe13f2175012ac0ef6b3cbc0c0f8023df6899c305febcafd. 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/US25T0617043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec7b539aa86464b17d678b46aee79667600fd0f3e30353abd0e10a4e8d65bc52. 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/US25T0617044.