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 0xe85b6a979225cb2748552697c60b763fa946de3cf85e1c83138cd9bc914bc1ee. 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/22a0f9b2-67f7-40a3-97c6-45f75cc3735d.json and https://artists.proofprofile.net/proofs/artist/22a0f9b2-67f7-40a3-97c6-45f75cc3735d.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 0x45c0ec5094b501f70135cafbc279aac6faee6503a1f3cc05f46c3cd1e6a566d9. 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/TCAFP2135304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d1d0e2a8e85a7b4c8bcde428e5872d25e0f5aa11c5ebf1b360c6826443a0162. 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/GBRKQ2256875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4994f0e32bcffe9c4380b691234840642c5157aec01d4887f22248930deaf679. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/QZMHM2265019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cdbd31a6bd678a11b78456d3fece675d0073ce5bc72d66b5d7e791adcae066b. 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/QZMHM2216023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a4522ccac367e1f65313d46343d6c1f31f16708e5452912a0ad9518b540b260. 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/FXQ692300069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee9254adde94d3a9ac439af117913d1ad6afd4635c4ae852a9496bfb66e64ee9. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZMHN2235399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44bc0c09ea78c5a6cecbd3159d22ceaefeb3351c8ce96b8cef8b826db844ef76. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/FXQ692400111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ee55631b4cc7c5dab0eec576235d8f251cf31c3a57da7c57bed0ac360d0406e. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZFP52444759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaf5688d0135c772dbb9a9e5621052cde9422b18dac81c4be62342a5882b5441. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/CA5KR2467125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c7c81115878750da1fe57a242b8489ccd69d247c0890af94f7149d3052276d9. Chain 2 (Bitcoin): anchored in block 959073 (2026-07-21T23:25:37Z), 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/QZTB22447372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d0b3d021c1b4be1516d6d13e0604e09d32f7cb6ea76de31deeddd62f8f54fec. 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/FXQ692400286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x567acc71eb9487c43a7be04b5476ac2bc610cd2d950ce056676a1f040fc2ede1. 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/QM42K2417749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x567acc71eb9487c43a7be04b5476ac2bc610cd2d950ce056676a1f040fc2ede1. 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/QM42K2417749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd6457bddb70693305df663df7048168da0901f9380a22481e90f426d91518cd. 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/US7VG2538352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5c022654f5fde49435f5c115d5569e9609d6169af7548723eb150c2df52090f. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/US7VG2538353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b75ff22e3159e91d923bec9138427053e178535cad094d3b847ccae03481124. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/CA5KR2516542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c200d7c9b65ba11ca48ee71fb450a61645dd052e59d23ce870bd94e5c066a33. Chain 2 (Bitcoin): anchored in block 958864 (2026-07-20T10:24:04Z), 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/GBKQU2573723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb4683dab2f5b1e403bbff98ff5b2572e7caa5f3fc61f3e901769a56c7bb4f8f. 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/TCAID2476806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd847d46c6963bb508a65f500169299ce971140a58bc25bea8d513c5bfbf6216. 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/CA5KR2443153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55d70054c2b72d8f5a3723caff8d82600ea87f6012f29c831a6c1721b2d070b3. 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/CA5KR2465031.