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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d27682459e448e0ab10b85517a5ac0b177c4e721c7336e0ce7c946c56740dab. 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/d91b9a16-5299-4909-91d9-6ad33712fcdf.json and https://artists.proofprofile.net/proofs/artist/d91b9a16-5299-4909-91d9-6ad33712fcdf.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a49a6c21c98c0937c413dbc8706efd5642ec61af980edd304f366612ae97e99. 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/UKN2K1800003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a0f2718ba1dfcfbdd392b269126bbb17bb76d2838946e0ccd146ca199da75c4. 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/DEPL91767201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c2cdb635dd7c314631267c1d579d222803c1a8914093676dd2a9fcc17c37666. 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/DEPL91667172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc31851169dec7a92eae56e91e7cc9fbbcad8ad9568bc1f19cd46d586656288ed. 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/DEPL91667171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d7b272ae45f555873b70067ac402748c6b74b933ee92606d73fb8f34f525111. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/DEPL91667162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb02578aa457f90925da0447a576f988ab45221eb0fc203f18fde97f0e2d021f. Chain 2 (Bitcoin): anchored in block 960175 (2026-07-30T00:16:15Z), 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/DEPL91667161.
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 0xc63acf3d4a2f696bf7fb4cbf586e4a74388eccf3b0c07afa93347e85470d6cc4. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/DEPL91667163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3a8af563a567319217230576a2b73d7ea81851b7ba88a0e216363f057fe0ce8. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/DEPL91667164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01b66874bd70a684fd7b53a3ef3daccd5b83f3f112623a8750395d8c2ec95c76. 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/DEPL91667151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31cf48d44fc07aba0c4c35c9c12514ae056e4c16869b75f2c88062c1b22f92ee. 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/BEN581500503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70df3fb1244c0f60910f364cf74f5a046a4449942d8246d55fa7cc9f84986ee1. 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/BEN581500466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ac9b01b569cc4f640f804dabd4e2fcd6e3ad8e4ed0b819a14a414c72f0f8fb1. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/BEN581500122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf78042fd081139e5ac120c88f55b5687bd3cb769e067da4b0a2078a343bfe46a. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/BEN581500123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ec113dc92dc4e13621f2dd2dea90c8dc3e093ee471781c09cb20cfe501aef6d. 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/BEN581500007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5631d97576ee1e66e78cf2118bbc76a3273595af165133361af4275941ad64b. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/DEPL91467091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf78bc0ef9cb0ff8a599ddababe793b4eedb5fdfc286a2fd14a1534591f59dd34. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/DEPL91467093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1055ca6c805518040ea54643da3d6bcf02d1559687a77ddf6fefb1fd0e6d3146. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/DEPL91467092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa53a4a5d1895922b9c8c9a2c95f4c0f84384fe8cf48ed4a6b08593ceaf1bf371. 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/DEPL91467095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x918861bce42ccfd31a6f6538a2a31ea6cdabd8f1c34590e579c2355851f559b2. 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/DEPL91367081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10a5d6c4a69f9cbdae0eb0257dc4080c18e78baaa43a0a1e927624213fbc95cb. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GBF3S1300035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x338df019766b3566d11a17004fc956283af1eefd4f43b3992c5701437e95f3a4. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/FR6V81864712.