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 0x7742b911f30d69959d27f86011bd70d4c30bee4a8f4d5fd7091d78cc3add4b48. Chain 2 (Bitcoin): anchored in block 953786 (2026-06-15T12:56:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/db32c57a-361f-487d-9cfc-50a18242af91.json and https://artists.proofprofile.net/proofs/artist/db32c57a-361f-487d-9cfc-50a18242af91.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 0x6422957cf776f1e50c5ee5397a2b6a06d07a1a592067ca97fb824fab9b3061ef. Chain 2 (Bitcoin): anchored in block 960285 (2026-07-30T17:26:40Z), 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/CAB581400401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c8e4fcd9bc370c6244bd61c853fe41bac8525ab43ea7ff081225ab7d26ab0a8. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/CAB581400402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd68dc76aaf8af74ae8f0a775841bf73312937845cc3478f49e7893268794ba82. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/CAB581400403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fb9dd87a70fc77f6509232e66ea12e582379250320e1a87c4f8aadd5d431bd6. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/CAB581400404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60afea7abf2acbed4a29fbc7ab60ff55878107de30e0fb1c2e8e095698c86cc3. 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/CAB581400405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x530137861fb1b7f1fae3614fec1d3e657134074e890107cae24c869691a11e7a. 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/CAB581400406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2d1fa9a5fe9767691e98dfee2fa639de28c7b28fda973d868a2115c65d6a33d. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/CAB581400407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb863599fb06ef39bd679459e5cbc7a420f5b493e7189256be1f1b6a263202bc. 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/CAB581400408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36a2460f4d8c21268dfc64a555c08fdfdd7d279552e379f03c97b3b5c2272711. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/CAB581400409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ac34daf860a4301f7f5790920bb4cc3f80fc006391a463397af8b875db12770. 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/CAB581400410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2582f8eaec16b5a59f028a43b90d939d6a2abceb933e1d27b4df775daa041f0a. 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/CAB581400411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1191a78294fe3a0545fa07dfb5d82b985f3ab3ddc0484400813e58920d21aec2. 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/CAB581400412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb7c68b33a6e3ded970d2367f6330f114a163d7ee6d07f9d979138f0bd1f27f4. 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/CAB581400413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6522c7e3d5160c36e9d7c35d4511b10034f77b64b1897f9a8c33375ed8e7d5da. 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/CAB581400414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f9db79655c4f348941b91980c8720d04598dbb370a141bc7a7bc665f4a1c55c. 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/CAB581400415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfb9a458e20eabeafe6e6b2222a71a760a67144532d1ca321cfb6051d0c0a659. 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/CAB581400416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c8a4ac18791d3f18a1a1c9d257e3fd7ee44b907897cc6b47902fc6e51f291c7. 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/CAB581400417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83740e072021ac9f461915bde07ab46b91c729b20d61f67649d801ce45b674fa. 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/CAB581400418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b7dec81f0b29bff4321045ee1b86b209c5f69070b59c8df92e7d648386a136d. 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/CAB581400419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c0c1249b7d6629754d2e8f213eff5571997430594697533391673fcb3911396. 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/CAB581400420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7279670c05fbff95ba35aeb60ee202a2be4f331dcafb504f53820157d7d42219. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/CAB581400421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e8ee307e97d9a28149a0f138dc60f0ae7d1a01906e86b2e8098b90048d171b0. 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/CAB582500102.