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 0x633ac7391c55cf015f5fe11e75aa480fa66fddfe817e270abd1fbb626947296c. 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/55d9d09d-13dd-406e-8fff-abcfae66026b.json and https://artists.proofprofile.net/proofs/artist/55d9d09d-13dd-406e-8fff-abcfae66026b.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 0x677c34a81e6eaf1a2b91312c4d279d10b3221094f5c967f27ebb4d2cc935a9aa. 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/US3DF2089526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1542c7e1f2c4f3d744246faddd59cc85152d65bb45176eba707d01f29313f52c. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/US3DF2089534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4939d758035889a19c1744cc208d89ae520cfb24c806e081bab4939140a462e0. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZ5FN2117763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb0b879d5589d7517f70d7bd99d980204ea49ec9bfd5bdcd5c3a6c9a21031327. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZS662141090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6b40d26d1b186615a3724a8944f40a49842b4384364095ad8061b531f25d745. Chain 2 (Bitcoin): anchored in block 958644 (2026-07-19T02:21:25Z), 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/CA5KR0013059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99e4362dad629060eade5662baecf2170b0d7c680abbf1bcd89ecbd32f0cc42a. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/FRX282352016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4626f3c404cd65cc22f5700d9523cec2a5577845e23297c68776ca6bd9a89924. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/GBEWA2303266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc162c897997580083ca4691e18b2f5a381f8727690068973c0661083b84a80b. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T21:42:22Z), 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/DGA082389187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a045b6dfb65d2aa46f87aa4e3897025b3e75291d50e92fdbbeda94826542d76. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/CA5KR2453925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dde54b990fdfff55e6fb823f667a0d1a63e4f92a65e326247dc976ed5c7491c. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T13:58:18Z), 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/CA5KR2481507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb282bfbef68e6b01779d91a1bca74cf077d96780e2592acadc3899d89b19c02. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/CA5KR2481766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fd514dabd98e001257caa39ee942d5bd5dd50bdcabd6a3dcd89024b49513cde. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZTGW2405628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x066c5dd652c6e59d76db9fd2d67253a89dfae1891ca1e520c03868e8dde6f2cc. 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/QZTGW2405629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x720b03f28e925ca88bb2e86a876e922259b1b401c0bf8cb835e95e1aac96a349. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/QZTGW2405630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x677c34a81e6eaf1a2b91312c4d279d10b3221094f5c967f27ebb4d2cc935a9aa. 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/US3DF2089526.