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 0x2e2cadad8139af5e2ef5b89290f21219a77fbcae5471fe9a2c391d9cd186fa28. 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/d462be5f-9f24-43cb-b91a-8eb7eac13029.json and https://artists.proofprofile.net/proofs/artist/d462be5f-9f24-43cb-b91a-8eb7eac13029.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 0xa88f8c5e6d6c235d6c02813c349b585887e62f96874469dc10fa8a3a8380d809. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/USV291471032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbefc79262a7969a0064089b23c4423cb283e25464340051ce1182703ece11c7a. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/USV291471033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe690faf2b011c52da147556430095fe67e7f1a897b250bcc7e201b38058f7dd5. 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/USV291471034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd11b6cb68a994ef52ffe154438dec2fc0f0714ef4c7704e37500380f7dd3eb75. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/USV291471040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x888a71ce19f9894927b41a86ad87414c15fcb1c58929e405139e68c6d64cc2d6. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/USV291471043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4d7ecbddfb14964a1fbfa7ecc77a54de444ea673ea35a3c3e9c38b2d7610ed9. 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/USV291471044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x651db44b85c9ad29a47893a770d38384a50056f9071da2ffc483b7c1ff8fdb39. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/USV351406071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8177a81fbb18899d2c65b4d7fa5a07751bd875e784cce48e0d4105395548dd9. Chain 2 (Bitcoin): anchored in block 958510 (2026-07-18T06:38:22Z), 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/USV351406079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe764560440489fe7442027c91da5e9c6f0d3f0cd789df977f0e06de956902f2d. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/USV291471080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc6f08ff72205118325c5d6476baf5730eb2b837251adcb5ae388e4b82fc1b39. 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/US6R21496326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f41fbae104dd04f0164b11fdc6cd29dc100c71b0011cfb02beb838de828924b. 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/QMFMF1577870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9526ffc4d2e58f295259d533067a39b69c14b3c1a487f0d9609635f831595a7. 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/QMFMF1577871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00a9800525a6aba5ea3d28030db82f9dfea60c5e3529e9511cbd3dfcee855b4c. 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/QMFMF1577877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeac4e93d79f151326664813e58b5c1e291c324a8530879ee5916f5a1434b2b98. 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/USV351405985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa66359c35b4d4d3aec9ff2271415fc54dbb1b4b09e0ab63f13fb8e88e1d313c4. 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/USV351405989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ed4520de52a5aade134a7649a1bb1c75657ad15184d230314a6042156490799. 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/USV351405993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ea93235de989f0f9fe2edf45558e635b4011728794528598c97b8de66dad556. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/QM6N21817521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53679698acdafcd6f6081e0a36d3b4a5df77a4fb71927c607f2f37e282e63bf1. Chain 2 (Bitcoin): anchored in block 960355 (2026-07-31T05:49:18Z), 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/QM4TX2483622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53679698acdafcd6f6081e0a36d3b4a5df77a4fb71927c607f2f37e282e63bf1. Chain 2 (Bitcoin): anchored in block 958378 (2026-07-17T06:45:39Z), 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/QM4TX2483622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedbc2e2fb44b4c50e69cb68c38f4edcec26a8b1f6f9d97dfae0577a626581f9d. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T16:15:11Z), 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/QM4TX2407070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc029158f5cba8452a7f86f6215f3bf39150c8c8c253b18ab7addb2dbfd908e1. 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/QM4TW2473086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4ad3fec393236976f9a1582d8d69d349a3f694f47d7d946f47966c97704b750. 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/QM6MZ2440057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4174af074d6192f1dc0045d49aab3b32924f1eb1b0cb382ea40098f8ad24a17. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QMFME2472165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb11527e53570503d14975809f7ba78c1c4bfb3b07d7834058c1e7518e7dd6b8c. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/QM7282528691.
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