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 0xa5b344e3d251464f7267d870ade9aad5d19015a5ae50c535c662b9eaa94a4214. 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/a6cf4a0f-ab6c-4139-8f69-ee5e87639310.json and https://artists.proofprofile.net/proofs/artist/a6cf4a0f-ab6c-4139-8f69-ee5e87639310.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 0x09ba6a525d4c84cf43b71fdd924ce6fc6bd5a50037bb36ffcbeea315fef6a4a5. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/PLN021500210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe88060b99d80b88cf3bcc0112f9b20c5e4291b2ca48928d5a2a11561039ae000. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/PLN021500211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf93a2be6b9be15af8410d333367488fbbf814bcb18298f320b9c036f276ef93c. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T19:01:26Z), 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/PLN021500212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4c6f6c685308f8b79bc794cf2598ed742e25f634a0555f5693960a712d810f8. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/PLN021500213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb25d805cfe43f805679d26420747c16ec2b467aaddd810126c694c71421b64e0. 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/PLN021500215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee8ff617dfb8dd3319ae1e0d6e6231055e4d06033a87d49cda9822e965d8a80e. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/PLN021500217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a33b47812d98883de91dd27a6537ad6dd1212bb12128398ab97f1e583291a05. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/PLN021500218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb20205879e5643df912dbd65d9dac705d14b7015f6194bc9f807c3f1bd38d45c. 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/PLN021500220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x691ed5b75f08a220c629bab2cfacaa3e053a0c7f8bb20a98f512d92cc0eb21bd. 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/PLN021500223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2c82a471c78e2747389c8c46aec51b310dea1d0c6e105a9139605240f8535b8. 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/PLN021500225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6951597aedd658124bc7fb5544c0b53fe6edd6a565bc3dd8275acfd81319a86. 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/PLN021500226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06c2a22f888b4904b04ef1516e511701c95aa705cab376ea8e50fa0fa1e6e166. 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/PLN021500227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc60c5336d3901bc59b332f6fcbf0d062c252009970d424bd7e697f49e49a1d3. Chain 2 (Bitcoin): anchored in block 958817 (2026-07-20T03:52:09Z), 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/PLN021500229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb544534b6945175e5242dcdfbc85fbf571d5bb048af5ede832096e30503398a. 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/PLN021500230.
Piesni na Wielkanoc glos meski z organami
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4c2ba0b5c6436720184efda8676dfb15569cb1ea2c765394848243966892b32. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T02:04:26Z), 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/PLN021500301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07ced00e3fefce2fac90ce9ad8e577f12ac9d3627c2895f8bb1e6983cb576f5f. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/PLN021500441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffe7d3d3dd183422a3256f6f8429dd09d455659cb94d1e192f23f4f3a9e26dcb. 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/PLN021500205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x568baf2cc407c4ce3ab188d94a9678df6863b0a830a7ed5b9f18912fa33b45f4. 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/PLN022000029.
Pieśni do najświętszego serca Pana Jezusa