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 0xed0461f3c7aa86ee8c99ec17f8861913cff35acf9fdd61aa41c94241f0cefa3e. 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/00d4b2b3-70b5-4995-abfa-c573f011b998.json and https://artists.proofprofile.net/proofs/artist/00d4b2b3-70b5-4995-abfa-c573f011b998.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 0xb9f08eb2ee2eaa2524d0c9e27dc2596daab7c19a20e68ac13ec55b9e3eb8e398. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/CZA231301383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3123808d035dd5a0662d4a573a5b92fa26211a14a745eeb9659b52b285b52934. Chain 2 (Bitcoin): anchored in block 958508 (2026-07-18T06:27:01Z), 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/CZA231400014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1526f298f43defbf87e97ec2df3454e048867bf6a1f17730766a1bd735941696. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/CZA231400015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00bca08dc55d06dd28dd959d203730a10e4d27362d2381ba5fff9856e19ce7bd. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/CZA231500072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c79bd9b795a275c56239b24fe3a90b418abbc203fec619f03ff1b02451cb121. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/CZA231600060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b6c1177569a005e706ed339aeb96df6a9d8f03e6aafd769ab7add4ce72f6525. 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/CZA231500282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce1dab2bcd62be86c94c5cb3e84f0acbd91354f7b64f9f11bcae57ba684b5966. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/CZA231600093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacbc39d2ba83f965fbae3d4fceb4b7f44d86402cd9e6d79b0291ef66aa229c6c. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/CZA231600094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3716159852e0e0496e68db738163437db88d4e0c04cf2cb860282673d901a58. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/CZA231700206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50e6f37c9af180d4086dc52e976e981cc3ac4aaa93e63a0f04c2e5e22bcc1be2. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/CZA231900353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b60408efca71ba0a1b6dc65923897045df0ee3a27e0dec1429e5bc4f512f12d. 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/CZA231900439.
Dokud nás smrt nerozdělí (feat. Sofian Medjmedj)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x696a17db50413dec51e8b2914a8f839f893edc33fd65fc50cc89cba450f9f228. 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/CZA232100017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fa3833ab9b9f7d62ea7c48beb6b73b6061077e1e0897b2a89b06b1642a8d8c8. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/CZA232000423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd78bbd3db1a69c1e99bbb5bd1f25fe23cd279c21c5dfed92c5c2082786e36b2c. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/CZA232000587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b60408efca71ba0a1b6dc65923897045df0ee3a27e0dec1429e5bc4f512f12d. 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/CZA231900439.
Ty a já (feat. Sofian Medjmedj) - Acoustic
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ec602f0571874bf203bf31f6ac8a6a1f5a820ae132562dfc788a66e8dd43c68. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/CZA232100113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d84d14a07d7c9a331717352e3a339e8737f06e0527cb304dde72510afbe9fbf. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/CZA232200712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61b34c834c9e4467f7445427eef0234d75e15a459b738fb61b58c6b0a0fa3ec8. 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/CZA232100502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7c0dcf172cd57bdac3d8057572337db37d52d1c9f00d296c2c93ad3af446e3b. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/CZA232301447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4c9878448968e258bd23c59d91050373729ee0a6a12ca3ec89e527c53806141. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/CZA232400032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fa0ce7b4bf6afd963a85770a46c1f72949396df09176b9d7b4e1e2e55d717ff. 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/CZA232401027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4c9878448968e258bd23c59d91050373729ee0a6a12ca3ec89e527c53806141. 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/CZA232400032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa73e811353536f56424f54e0220fe393b24927b4bb7926ea9d3250c207d467dc. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T09:14:08Z), 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/CZA232400244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe826462abca26eac713fef18ea245019cc2106a2ccfb8a696ce4665795eb01f1. 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/CZA232300676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd97dc58d1af2006af522eb8644c5d0b64b38547a8ad17812e264e13d02668864. Chain 2 (Bitcoin): anchored in block 958714 (2026-07-19T09:51:44Z), 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/CZA232401116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f8967573230e51d95d1c555bd7cac3eeeaa432455aebe3481cedc1c24cc5054. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/CZA232401117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d284533c826bec65a8314443315a5f198eaae81a5613f5353d5fcc13e0a58d0. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/CZA232401118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f3a875db3762b4831b938c8ed8e863e4371f3fa14c970325929c1c258190ded. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/CZA232401119.