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 0x593f0b9f64154f4aa48a8702dff6dbfe9215a1e59dc143c04f2a6f9a9e77bb43. 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/951cf2a9-725b-4144-9bf9-b830e3c027d9.json and https://artists.proofprofile.net/proofs/artist/951cf2a9-725b-4144-9bf9-b830e3c027d9.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 0x07bc35550bd5929bec234fc3c140bbaa024129d5649e6f72765c5742a7fdadfc. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/USHM91676234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fad6a77169209f6926eab962148d8898fb3f9a02c0fc29981e6c7d035f9699a. 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/USHM91676237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd8e48206459ae630be14f76b7d781ceeead7b7d9d37fe9d25f38057bc3e4a49. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:56:05Z), 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/USHM91676239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5aa80495621a06e2096d9bd04f9107c5396621e06c3dc3142f8bba85b6d2e5cf. 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/USHM91676240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19c6ab98187450606884a96bd7ade2ee30f6c2b59cfc9d30b4a1d9ce68a20fd2. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/USHM21840230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1afb6228fc0da5b02f3001dc1506a8e21082f4f4ca183e151a18b9b93796e1e. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/USHM21840233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x479e44d3698a2be07d1800105cfc9c35ce8faa80f51b5720512242d18a4e800b. 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/USHM21840234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed5e71942818528fbad359e7da1b11e3e2b56475b1869f9463f5e724f3db37de. 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/USHM21840235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee0686b04fe086397ce810f69774c428b7b1248b8ed3449b67805a590d60d09d. 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/USHM21840237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad99b133e89995c50353d0fe8dc11372071c8a31c81c99bf9bd93c97d0855f8a. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/USHM21840238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0705413374da5702178f7f06fb2f8411b55e8d7623a99df427d2c70dd1369137. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/QMAAK2255822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e5877c0a8ae140bf3e835e98e5c7b1aca700fd03061b2275a7b1c5f137de5dd. 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/QMAAK2255825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac5d69d17c46366ec92d33bde341fefe1a941729e22e1e802fb5029ea589bade. Chain 2 (Bitcoin): anchored in block 957752 (2026-07-12T20:53:32Z), 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/QMAAK2255826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d22beb6ed03c97719e8b2bf61610a1b71a09e2c6b16ca91d3e71053f074e072. Chain 2 (Bitcoin): anchored in block 957751 (2026-07-12T20:41:42Z), 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/QMAAK2255829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2466a2c5b086ff22596e05ae39ebb2d87d5fd58f3a240f9383a018ae60a665d. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/USL4Q2437491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x493ce545a10070f005f44744d2e65a2c8ee5e37e5fedd46c3f7aaf62a64fc902. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T16:06:31Z), 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/USL4Q2446081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef7bf85f7e51649aad4fc4aca7068c2ba64c7efab364ccfed7ad8c19d6db4365. Chain 2 (Bitcoin): anchored in block 956405 (2026-07-02T22:22:35Z), 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/USX9P2400726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02bf89d8bff0b3ca5e5a6b9ddef225e264be74822f9245c33893bcf992df19d0. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-16T00:35:20Z), 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/USX9P2400727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e125843538a8f9f068751b5ede08cb353e228c58549b829cffc4b6a52406b4f. 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/USX9P2400729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13ae3c91d15cce89b7cd22ac848b8ac56debd7e26a1113b06d5ada78130c63e3. Chain 2 (Bitcoin): anchored in block 956404 (2026-07-17T02:59:27Z), 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/USX9P2400731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86461d5fed0a9039fbc9eabf0f78fa302f7ef587c4cf87001c7ffdfafd54d9c4. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), 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/USX9P2400732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b5489883180ee380e893af4d61b42fa7500548c32589a0524db8b029d3652b5. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/USX9P2400733.