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 0x73eafac3fdfb406a8dc329ec140f07eec35a47976197c5fa922cdc69872f7909. 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/4072a8d3-b79f-4894-a63f-32cdc17d2e80.json and https://artists.proofprofile.net/proofs/artist/4072a8d3-b79f-4894-a63f-32cdc17d2e80.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 0xfa2b6ed05c4ff3f6fbcec7c5a91242797b74971f19b6f6eb8d3da181dbb5272a. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/DEKB72550476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa4ac70ef1a2eaf0263460feb00e2a921b6df63d4c85ecd19e2e0f1e44ed9f5b. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/DEKB72550478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x949a61913ecf06c4c19f1930bde00c82a4e1b27f56ed1ba623a921c498cb8265. 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/CH7812214215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b0673ba7c1a556677b3020a6833e839e3d8192ec31f8157e1bed6d24eabaa14. 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/RSA181340740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8228767f598eaca7fa61b8798da8fdd94d20607e7f7684b6fa9a7be517b98556. 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/TCADS1815237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc0396443bfe0aa47e5c9002f9df7bbe83ce44feec33f8ae677e6f6c290cdc39. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/DEKB72550474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x930fa29617aba745ee06f373f3e9e9c2aad1bc2d1cd1868c2d5367dc771a8299. 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/DEKB72550471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd345386a46bd5da50926897850ead38d1f7190a263e6e9717d62cb1bac4362c. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/DEKB72550472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2e55424fcf39c2bc8c9b4d0dead86f0abc060e73d378b5e556521f4b66db2b9. 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/TCAEG1948334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x506f16069a1fe9950389fef8477e531f522ca35a86a378ce9c97f3e03b4d08b3. 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/DEKB72550473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc08f17357dd1e33e6859a2ae4e81ce5dc02c24854fcdf2ca553d916791b3ba50. 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/DEKB72550477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dfe263f33aa852f3d776bce13cc5e12aede3bdd867731d1138ff0c56a21ad1b. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), 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/CH7812222409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9a21814b552e8d70d3b32870b00d14b096507ca1573c2c6fb7610ecfa8be9b2. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/CH7812240679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x255eb0ba91ef2819b90f56a5db2d108e99321311091577e60ae480ca29ce021f. 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/DEKB72550486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85666a86ee4395572bf433cfc2624e8ad83a52dfcb76793a4306d20db4fc31e0. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/DEKB72550491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde8e51a4c39cbaf867d6943d404dfbe9904fe7a88c2b357291b364ef0483584a. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/DEKB72550492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b3dacefa25daefd1ee7c72df7c28caecb29cc172ed1739a43be8d6b3c4d136d. 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/CH7812347450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaf927a07ceb41984f09a11e0aa1c1fd344c6af85c329cca708d5a03b59e7355. 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/CH7812347451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf46ef438661a24826d4f8577eac118351ddafaf5302ddf330bcec77048111a1. 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/CH7812347452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf53b0a2785ff0d930ef43ed2396018366ded9cdc665cf3bfb501a6ac2b2bef59. 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/CH7812347453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dfe263f33aa852f3d776bce13cc5e12aede3bdd867731d1138ff0c56a21ad1b. 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/CH7812222409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb35a8e73e09fe27b391e4c5d9d27bf5961cc92dd948919dff22807f9e0d377cf. 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/CH7812354040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6f7b990af1626770c9fa4281a281b1beb4d6c72df8fc9d41b60c2e0c7642421. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T00:07:05Z), 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/DEKB72534007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7f813c5db4900956dfcadb387f703b088ec825f9a53aa81b9ce11bc30961a95. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/DEKB72550497.