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 0xa27dd131d53078acd5688115ca830ef1defab9ee6897ea106726d91fc28f9f8b. 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/d782bcff-dc74-436f-b9ab-d05879615631.json and https://artists.proofprofile.net/proofs/artist/d782bcff-dc74-436f-b9ab-d05879615631.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 0xd5e3b7155aaf96ae8bb4c2491933d1209d2c21fcd9ceeb35c20608074489b724. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZHN52160934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3974784368880230f0c08c9d554a12c4bf1f18e07efacd363ca630082415c630. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/QZHN52163977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b8dd9029e5b41b21c3f141ab61f870a4685401b389ebb98a743b64ef6c80614. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/QZMEP2149887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77a5aa147404de15e3fe865c4301d17e488c5247f9aa3dc411f1f5768bc8ffd5. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZMEP2149888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8b9ddd45066ca0c1c1dea989070004e77fb7f8f40db31cb6f48863d85dc8004. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/QZFZ42275152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2355a82747ecfb1233c6c33310476886077535e2a19f1fcd29aee51718f8ba2e. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T13:00:52Z), 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/QZK6F2238791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeeb4e17df278bd00e2a7f48e678730ad625a6c978a56a75e4f7571d2df14f0a7. Chain 2 (Bitcoin): anchored in block 958714 (2026-07-19T09:51:44Z), 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/QZK6G2348661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e2eac25ad70f79b148b7980cbfae3c81ff8e6b8680820753bf8ef25103b9ca7. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/QZK6G2349633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb76203a8a3da78528ca4bef29395343103cfac249b483b7fd635b1f9b0aa8d0f. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T09:05:19Z), 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/QZWFR2365926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf43bb41ec34e6e29f5ad1925eaa238a670aaedec4bd1ef75d56787238da4bcc0. 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/QZRP52408175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa7d7d8de1dbb73a60e86781961f7fb371f58fd2b1cbd82a5a3629fce02fee9d. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZRP52408177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x946114a0bf93f9f0f42ac8414d1ae296e35007d0000f6744e3fded992ae8e061. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T03:21:53Z), 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/QZNWY2461650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8286b12f7f0c7ac7a1282f6b18407f303b768e546296b304db6c9342f46c81f3. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZRP52408178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5de6c772595ba502dbfcdd9c86943c9fda50bdb2f55e0c02bed35c4d14ef1326. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/QZNWR2445631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc91ef37f34f5572616fdabef841368d04002e86aea1a93c38e56f426a311d149. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-16T21:55:37Z), 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/QZNWR2445630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1517f303bb7f7b80d036cdd1e99ddb973b3760a574da8e09f49ed787d40e2275. 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/QZWFK2418971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21af9c82bf8aedc448986e581c880f20949c2fa5d05ea9c86ae926e1e377be07. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZWFN2441487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e59d33f2a5b61d08f3e03e05304c65d1091f2d9c37546aecc36875c4c7a433a. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/QZZ7T2520795.