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 0xd8b1d8a175bd8ce189745bf7e60412b12b0e108e6999beb2b59a9f5a20715c76. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fe676a69-95b9-4839-a7fe-fe3165fdd1b9.json and https://artists.proofprofile.net/proofs/artist/fe676a69-95b9-4839-a7fe-fe3165fdd1b9.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 0xb00efba6b8761c85192e573d0c113f22e21b1555128a7ab365fb8ac666b1405b. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/HKD250318804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c3258aabfcf80fcc493c75d60e0d79d0bc1a151a750aeb73431a574a736467a. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/HKD250513701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x877b8aaa3820cc99e56afa1c56bc2cc77a9e9c1e85c0ddf6050a1bf26d7698c9. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/HKD250216901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9d6c18276475482c162e3731cbd3a65ad7eb2088d6efbb72cb911d879200bef. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-19T22:07:06Z), 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/HKD250833705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66350eb502890d13a99a0684eb06d1a50218754cccafb34a6dd3e81830e721a5. 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/HKD250319504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ba665a830cef30a83ac1dc6da53e98507f9aa7ba4ec9fb0b2772da00a9e8e9b. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/HKD250410510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0f3d9309c1870f3a405d28035caec4d8f0c1e58ad5a15d543f28f54871855d5. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:10:00Z), 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/HKD250615901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c8c4551e52000c377c0446233a5c8d04850cc65c69507809f05001163d7b0b1. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/FR10S2185096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab425162eb86f6e1a77f0619011ae237e55f2b0e5ea13391794ce481e885ef36. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/FR10S2185343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfbc31e8caa32f057c1a8f084c2bddb02c3e8b728c11c540dec1732cfa0f96a7. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/FR10S2191717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a0d3533c1efa4d9573a4777c2799a0faee45e222813e3028ddd76ec1efaa5ce. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/FR10S2185159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccdb3dcba1038abd82404e0d8b1f72103a1bec501420329de9e44c3f7c2cdaa2. 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/FR10S2185165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc26f6942c0706bb9529394927a804ee9f1cfbe6cf39f418c7c5733aa9730bc84. 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/FR10S2185419.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f81c36da3f64281d53f0ac6b492900c21d2e3f40dae6f40abc19432d9688295. 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/HKD251512407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66350eb502890d13a99a0684eb06d1a50218754cccafb34a6dd3e81830e721a5. 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/HKD250319504.