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 0x0cae2b8cec6cd06150af80ec845dc3bf75c9ba0ffd57ecc7ea0a422f03988d81. Chain 2 (Bitcoin): anchored in block 953630 (2026-06-14T12:06:27Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3049f9e6-350e-49a9-96dc-2b5b1386ff95.json and https://artists.proofprofile.net/proofs/artist/3049f9e6-350e-49a9-96dc-2b5b1386ff95.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 0xa437ebab49ceb96c24b9fa2c76ff383ee1c2716383feeea49f89c10f6a7d96e2. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/QMSAV1103829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcfe1c16452c80b0dfb381fae72f05739004d17e906e09f55168c34a6fb56ef1. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/QMSAV1103686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe428a0608816f60457e5a605448f5719fb8b3ce58cf9645015f940cab17ff4f9. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QMSAV1103830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25956e80a2b7bd41d8d8fef6525b4d4846bc2c436459ad58b000af59e9bf8049. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/QMSAV1103831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x846095f3f663bd13d13d6b3b6dad2724276d33772c711713c492f2658e5b27a3. 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/QMSAV1103684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcbb475e1c19586d12c9f270632e928c5cac732b7fbea791d774f171567b9d1a. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/QMSAV1103707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb41dba8d7a13e79f4dfffa66d0557a1b0bebe6805bf1532f067815d1d8c37f6. 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/QMSAV1103787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94411e921746d4f6f2d396d649d2b7e8a0165227e213e5de15d37f10c82b9b73. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/CA5KR1540487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6bc342c49db52482486f3ed6c525b1f6221490e862ee25196cab7884ee47e58. 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/QMSAV1104263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a42613f52c9f704ac9b5f035f8316222b0553c9a12e1b99039960a1d1ef189d. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/QMSAV1104096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa25fe357a512d2107d28d7e5617ad8450e0387a9ac92b17cfb4a9cb58f4dab53. 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/QMSAV1104022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0870663563d40c69ecf964bd83855cbd5f0b4b30b4ba284ba6002ceb71da8885. 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/QMSAV1104033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb60679088221b78bfbc1e7e37273e0ee45901db8a5b2e313b00cf3c83f970e63. 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/QMSAV1103891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe05b782a35eb902af89f8734aea15abcf4e83db37a763dffa970f4f133d64a9. 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/QMSAV1103741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcbb475e1c19586d12c9f270632e928c5cac732b7fbea791d774f171567b9d1a. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/QMSAV1103707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc571b5eda1bd787c0d5f4e3873b7c3652d6101fba3fd6f5c88ba4b0ffcc58f9. 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/QMSAV1103558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0fba9174d0d75799d4937280a5f81dbd0e6506e2f9bf51a65c07483d1acdc5b. 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/QMSAV1103460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf146712a5a447e638e35d22afcd53c41cd566371ee33c5a2d29b5bda0583eaf0. 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/QMSAV1103293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce7246f257e447a1f256c95267209a23d9bdf49a170bb9409a8c2c06345ad7f4. 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/QMSAV1103315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3c6fe37e2b5f3382fed7b92e2174139e250b4252e2f8ca7473617df0b4d3e7c. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/QMSAV1102904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa78ae1acf9e1042d0971f8f5b6628eb3c25cf5320ebfb3b1a5e6d438a35964b0. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/QMSAV1102813.