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 0xc9de9347be91bcb6017bf6da0f8be6b4ec9eb256bcf90427e354a591cea719ae. Chain 2 (Bitcoin): anchored in block 953741 (2026-06-15T04:44:49Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9dd233aa-d30c-4f58-ba20-8e2bb114e86c.json and https://artists.proofprofile.net/proofs/artist/9dd233aa-d30c-4f58-ba20-8e2bb114e86c.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 0xace84bfaef2b6e2f1622be7c8fe80afc9bcee64973ae6804904785e750164c61. 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/CA5KR2474151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd043512bef43139a44497de3d45da19b3483b80299cbc8ca73ea5c2f78bcbb12. 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/CA5KR2428300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09edd45bb52fe204269911164f19d846eba17db1ef9ef43b1bb47b5d9dc78a9f. 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/CA5KR2414178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6e4be6c95b28fd82fee639c6a19b5b8903bfb6bb0892ce6bb0f2bd41e709273. 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/CA5KR2355392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64f25fc4da412190d2cfe7f501c670f9b3bd2f75f71b6d4438ae8f1ed4aac94d. 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/QZS632376306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0d99850ee797a549bcc6fe259d5e940ae3cc15dbcb93f8ab11e850a6ae75636. 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/QZS642254472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1da81f8d1e549ce91a8ca449d02b3e9437152533fa80ef9e02b11e65ac0c8659. 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/QZMHK2247055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc44b4f06ca69108e48df859c776ad8a5fce7ee1be280c40bad8941f3e6be58cf. 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/QZN882186657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x600d81f975a83c9a085765f13f6634cf4fb58b3d49d3d68cc245b9bb4af01b6f. 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/QZVK62400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48093709dbeeb8c5699b79bd9fb5ef71ca9cc7880e7da7228fff0e6213988995. 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/QZVK62400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0bf17a0794cd2fe23d6d1cec326eea86241aa7ef40b13a827c3a2d41e1f771d. 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/QZVK62400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde71668de95210b49f7f251d05af8ef1221ca75ab37e2a5f1ab51e9234b98609. 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/QZVK62400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12847e47631bad61fde7fc15c59a12cef221c953999686dfe9ef39aa39787e58. 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/QZVK62400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99773c937eec86965692772f187b752415cce2265235748d14ad6a0d5d6dae4e. 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/QZVK62400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8163a434d3531950c43190e7ba0a80f13847c11f6012b52a14cdf1126aff8a34. 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/QZVK62400012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8582b5dc596a72826968d2b0c90a0f678f3fe92639ad202e0148bb9d6392f434. 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/QZVK62400014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc530ec0953c9f53e6715f53690d0850f493a62a33bc9298f574ac32fe766af82. 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/QZVK62400016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c20b21cb58b3bedefeaa9fdd9bc3ff2e36fb4d27a7c1367fb9090b0d64fa793. 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/QZVK62400017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ac90e9c9661a144cb0f814b09533f64ab0c1be2ffee3b93fde3c790f4d7fef7. 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/QZVK62400018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35c26101e8cf3d83e5eed0dbc751061425714a0f105b30b2c42e39ee68cf4ab7. 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/QZVK62400023.
this is probably the principle of music making
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffb314d073acc093e19b0a12ce6a46da69dcb0a4374029c2881565d14a28e143. 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/QZVK62400029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x452faabfe52b412cd58406267635e511c184279adc5599558ad71e7835d546f7. 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/QZVK62400039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc20cb5148d8999fed3047ea9848f255f97ac70917660e3f25f0251dcf58e17ba. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T15:16:55Z), 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/QZVK62400040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeab97a326b54cd54ba90d0b4cce2681be8b9b8af07f13d59ea51cc5aa6aac0e9. 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/QZVK62400042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e5de8f0fd008e9db8d7769796c2123bc7736b8544a5009aa0d4e2fcc0ddaa43. 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/QZKDK2521160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8402afc043c47f299086099e304bb242299ef94b89ebb52974e8854693d064a4. 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/QZWDE2584271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80a62404ae6bebfc0488a9595a6112f85062d2eced92c5d5836a7e5d363efa7d. 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/QZWDE2584296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40c1959a99e7503f58417034c3c2a172bc6bd78c434fdf03f5042c7f30e46479. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T19:51:40Z), 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/QZWDE2584301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48aed61d2bc73c5d37db4916842ceaefd7c907b6bacb5dd5aafcaa893ead3f47. 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/QZWDE2584307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5425cad4bada8d4ada2ea0a2d7bb86cbc76e6961f48400b19d8a393faff87070. 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/QM42K2531601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8980926ce13cca32d2695ec384ee77aa3729a8fd8505a75acfd45bf6af00188d. 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/QZMHM2596781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3e0d98b363cc84b82f9e037c7e1415efc425a137bc98959216fe5899f472fa0. 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/QZNWQ2197808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6afe9612cbe583fa4eab2d9fd98d5cb7dc9275fbbc6f7aeae1f354b9277df031. 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/QZS632270712.