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 0xbef64e07b3a8468c527246d5053b48e1a798e2df1a6a1934aae1052049daf7f8. 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/ec1ea519-d78d-4178-a97a-d239632f1a5c.json and https://artists.proofprofile.net/proofs/artist/ec1ea519-d78d-4178-a97a-d239632f1a5c.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 0xdf5a7680de373047c5fed26d6b7f0789a9ac592b1085cd13ac30f9d2095aacaa. 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/USA2B1400718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4914d298acb245adbab2f8d4a5d466d69859819a8638892a81030e6488a90c9. Chain 2 (Bitcoin): anchored in block 957608 (2026-07-11T21:00:50Z), 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/USA2B1400720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee31448671ffe3004287c01abd65cd287dd2df571823b620127a863c6f45f1aa. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/USA2B1900300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd7be2de3aa50285433c6a775a2a34ebe92a6ccf2c2bdd0c6a4b9cfd4d7a0897. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:50:43Z), 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/USA2B1900302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x798371c412291fe469e7a92f36d8673c591a014b83fd163d545e4b72f42a0cd2. 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/USA2B1900303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x051b989de3b4a18c06bd1da69d84749c0537ff8470f9d0eec2ed09bd91354549. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/USA2B1900306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c0f11abc325f08cf6d719656d4fae65f57a173589e7a6c75f9547f9dc58311d. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/USA2B1900251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf4df6e5629c2db07aacca917e111f8a3d423fb4ee31720ff9ace1c10ff15f35. Chain 2 (Bitcoin): anchored in block 958051 (2026-07-14T19:14:42Z), 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/USA2B1900309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x942fe229cb346bee912e6930326867d1496e42a76dfc2bdec2b528be8aa45b7e. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/QT27C2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x770584c8798cbcd676d811811fb17ccffd5fdaa0c51548a5537f8bc867de5130. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/QT27C2400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc96d89ec7be74b37ed7a46dede0c2161ed8aa4698cd744d05339bec283efeea3. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/QT27C2400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77e5420c121f43d2d2e403df3b005762d5bfbff9d74752760e739b9af558c6f8. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QT27C2400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80bd2bd171928713d732536e178f852ed479db5907a92980a939c0285cd2a670. 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/QT27C2500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f965b7f94fab21010d46ba4143f721ed031b750ef4b3ea8e380baa73b8f63f4. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/QT27C2500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82558740eaf50dd1044d1f8b9b501c5f20bd74af81422ded7319c6a02a37f7fb. 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/QT27C2500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabe80b9411b1c26d188e3d0de679d700a1d462059e37e3661f9c348b33c1e670. Chain 2 (Bitcoin): anchored in block 957779 (2026-07-13T00:19:08Z), 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/QT27C2500006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90a658eb97b474b8cd8c955fc245644e08da222d1f2dacade0dfa383b57448bf. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/QT27C2500007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab5224975c76f8d5f061bffad95802a85925adee000f752e3a65c07a5ce2ae1a. 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/QT27C2500008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x366c6a023e867afa3e3777fab1f66ed5d90b0533ef8f3d99d8ed0e60fcf379a0. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QT27C2500009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7fbb1fdc238c688bc860e56d41b9544190b8263b065f56cbda0288cddf29f65. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QT27C2500010.