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 0x2a0b62cd8c18b37f98e636acba6b7fb84b84288af56ed57e6e1a53c4362f70b6. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/418d8fcb-2b25-4854-99c5-a99e00b28415.json and https://artists.proofprofile.net/proofs/artist/418d8fcb-2b25-4854-99c5-a99e00b28415.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 0xfb03d46e058e67ee154ea1728f40103f6557a67b4c1d6bf0aa75805835d740ff. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/QZS652272543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea5fd2767ba1111051013e7b6a555b22d1ce3b8c0286afaaa495ef915364e594. Chain 2 (Bitcoin): anchored in block 958531 (2026-07-18T09:39:18Z), 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/QZS672410107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8733e26e8715e598ecb29e43d8076b78e57d4bf0edff6f76eea35b3ce4c9b7ff. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:51:33Z), 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/QZMHM2496104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6517be499712bb837f044300603e533ae6216b06bbe67bb3499608b26da0294a. 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/QZS662466826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x278e57cd8e7cfa3b260663b5b80984d97a63775f214a70e5488fbe71d24e44cc. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T00:23:35Z), 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/QZMHP2583780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x670dedabc1effd8fe58d6c837d508100569cb7145c9969a992c7c376accc134e. 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/DEPI82500738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68659b678dab79d6d4bb662e5e4a79fe9f27374351febd9fa5de0c7b5fd766a0. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZNWQ2565021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73838b0e7fb59e91bf9eda24619c094b93448306af4754729ac6680ab5073d65. 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/DEPI82500609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa60cb4ec4a3682788b8686b1864ccfffcd7f81a40145a3e2f24386f36350ad4. 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/QZMEQ2565943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f1d1b334d818a009a68f08b8289f625472337fd3cb1fb7ec7d4ab2113dc1deb. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:54:38Z), 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/DEPI82503167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3e686dbbd26d5cac6e4a5a84a0f5631ae26ef4e0695e8523276a0f8e25258e8. Chain 2 (Bitcoin): anchored in block 957540 (2026-07-11T08:19:50Z), 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/DEPI82505232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3de608100abcf5485feadb990865c5cd0c4a7eb4569c68b305350127be9f8c71. Chain 2 (Bitcoin): anchored in block 957775 (2026-07-13T00:04:23Z), 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/QZMER2541728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde9f8235d1d7c46484d48fe6f5ceaa691017c91e25a80d6fa04f52b1539d4e3a. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZMER2541729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd799b14d83b59953fdb3bcc519b713cb071e5d63f1a39e7e99b5820ab501cdbb. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZMER2541730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c988567c406e450caff5a02b6d95779c89b27ad8a04aeeca561f6ad56a1caa2. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZMER2541731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc76dcf5cb3bc99339d87ccbf6f6b31bdfbeffea5d0764b5ffb2e23d70dbb3f64. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:57:51Z), 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/QZMER2541732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1d9f2d39a9775c90e0f6b4de6d1f7b03d50ec232979cb43444a46bb2d3553fd. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZMER2541735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e05d8bdcdd7d025c37e0678e0d9bcf4f2d5d2a1179947e53315882808ad6dc4. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/QZMER2541736.