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 0x4bd8aac4fd30f571b20efcd710a02f86bc1a72967eb2ab0ce2a36f6d76f3de0f. 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/d872ddc3-e350-4078-85e9-0bcf8f7661dd.json and https://artists.proofprofile.net/proofs/artist/d872ddc3-e350-4078-85e9-0bcf8f7661dd.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 0x71bc687c07a00e02deb2c7cf7f6f41d43df3658e99a9a4d7d609640cfba16a4d. 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/QZEKE1924328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd17cdd279b6f96dc9cfaeedcfdb88b1fb00f6b59bd1415056c8c09f6da183201. 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/QZEKE1924332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41752d9f0ed67987d5e3b78f7e8e8f68811b90db4ffd37548d8bf904a8e62fcc. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZEKE1932689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cf703c4e21307189e6d56eea4ebf86faeb26652baf3c2f582665a9ef75c7d4e. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZEKE1932732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e4aeb6e5fbd3c8843f7ad15e8750fcc2960950b397a55cbb768e4e0090cba4b. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T17:58:04Z), 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/QZEKE1932733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe80580f6938b54a862f78f0eb2c790835ca6065d937496e3a1610f746f94d90a. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZEKE1932737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x325e55af9bf85e70b3d819445032209e27e33c563b28919d11fb054bf2868c14. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T20:49:36Z), 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/QZEKE1932771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda5ecd2c5bfc1fb7bf00acc5967f6f1d04210e173c9a9c42d61b7e4989c1e69f. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/QZEKE1932773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd234bb11a0bb5398a265d500e87ce47d6b89553edf55e70247e55e17720f07a. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:19:32Z), 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/QZEKE1932795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77ebe24f4910a0328eb470a11f717e553afeb31d990cc139014ac2284573407f. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZEKE1932797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5b908f2d0994ceec7aa2b8eee2974ea7a8d3d8d252ea59ad045fb8171850665. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZEKE1932923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cd0970460a161e765c1dfb8f4f01b245f06a6d9392f4b0481c8ee79414803d0. 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/QZEKE1933080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4637d82619de125c08b2a365dbd21e12981776c06ab4ecafd5c508eaca079edf. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZEKE2001913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f31ecf64232c145f7597febfa1ac87463854f58369244c8be563110b5d349cd. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T17:57:04Z), 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/QZEKE2002030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e43bb365939dd0545e0d052dcd9882cc9aeee6d51daa5a1e1249e1e8a4128ba. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/GXF9Q2531699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99b96dcc36a28e96d1da2553bae640f974c67d5b4a59a8083e29c34a0141aff4. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/INAE32502486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x412ec24f94de645393732996bd7dfdd331da05b351fbaafef03c20ce423b6a01. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T16:23:15Z), 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/INAE32502487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd4c1983d13b4f58951482d2ce68bdf86bf722a04952bc0c7cc5199b245bc9d6. 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/INAE32502488.