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 0xdab89fb1b6b0e5324d865d85f0dcf8e599af7c46e1d2736e5ded63fe90018229. Chain 2 (Bitcoin): anchored in block 953759 (2026-06-15T08:04:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b7bb34fe-7772-4798-8baa-a37761faeb3e.json and https://artists.proofprofile.net/proofs/artist/b7bb34fe-7772-4798-8baa-a37761faeb3e.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 0xcad3518bafa42cfca29a5b47fc8441c2678eeef89fff6dacd70c3f10258f89cd. 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/CAW118400482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14f1ab6aeba8f0356798165fa992010b534d3fe664b122bb74c2ae504c03581a. 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/DKK3A2201601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaed9abb2fa2bc527cc6dc24bc8ad98715e9a59a1b1210f2ae2db28a94eb4dd8. 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/DKK3A1901201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d1117995121624418b5c94a735ff150d50a5843e3970142aa78c1116d34b6a1. 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/DKABA0800100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb54a13cb838b4a981add1a8fcd0a3adf83bc627dce66eec9ac8f349983f883ab. 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/DKABA0800101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f7f30613d818269b59a0ed782cb8666a3aa08e74956006c9744d73c9e62b0dd. 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/DKUM70800564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44886d381d840a2e0b6ed1144b23678efa0a00322010edaa1cd87d8e5fc176d7. 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/DKUM70800573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9692e2c0d0c9c12460e38578016f76b28ba02e71bec67758b26bd8e1c3f3f14b. 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/DKUM70800581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb749cad508a3d17ee58e6a1c9d60a2e89d08319d52641e43ef5f698739bd2e6. 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/DKUM70800579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb93fd09a02478ac1bf85005294e507bebbf22564157e1f3c37bd1d060f4f162d. 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/DKUM70800585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9e3e290ed8aba3a63a22bf1cc31fb51b9a0d1d4839240a1368053b2e5e71485. 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/DKUM70900596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2cc5d986a2b1049f4a96395cb5996dd0af783830949f3c6068cf9993aa23c3e. 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/DKUM70900597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b8190f75a35fd9bc48d572ecd4e213fbf39616da127f02b3a680d9be0589096. 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/DKABA0310107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8beb4f6db0229032d45291c532ddee8564ebd2c302f64f625aa80385a46a518. 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/DKABA1000978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d955e65247714dbaff1745f44fcbcbf516ea82a0f55712a71b1bad805cde9d0. 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/DKABA1000976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbb0614c8d46b4348ab01d4f8e7f39a3d1095ac333b5fe52944c3bea6ddec880. 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/DKABA0600657.
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