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 0xbb2b69424f7d9c5ff6e4c870887bad5f1c26f34419f046cd75d36e748e492503. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2c88cc54-6b82-423e-af7a-a1e82234aabc.json and https://artists.proofprofile.net/proofs/artist/2c88cc54-6b82-423e-af7a-a1e82234aabc.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 0xc896c5b70f3498c9f32b49cdadddf077a7cc19574be4ce21ce38551f294dee4d. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/PLC062361538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe58ef1c16fc9871f0c18637fdc456697034abf08f3beca28a5f2ed72d5843403. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/PLC062387819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57332d564b31511060be5e2b5276d8e6bc00f5dc88f947e01993d31d18bc2ede. 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/PLC062387814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba277f4b27fdb1c4667193712d85b2ef5ff55f4cadea826c1c0545c9c88dd12f. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/PLC062387810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c62bcb7f083561d5b18c07f11186936d19f2a413b8d76925c9a86b3a37c6121. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-16T21:55:37Z), 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/PLC062387805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56ae01ac61a61e1135c9045df84dd1a31da9d6cffc31489ca6ddbb05021ac78d. 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/PLC062391785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc118df9d5c6f64a942a41bbe62896e496ad10e353ca175f4595c562c173e9213. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/PLC062419002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25571c4030585fe1a20a778cab603f9857d944758c7f462420437027ad8fb99c. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/PLC062419003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe856c1373ccdf0621a67bc0db5fd51293661a96056e674578fd154eae1d376a0. 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/PLC062415895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9489249ba73907111e29250c24dd7b59a94533584af66c46c721c1b3b2961ab1. 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/PLC062413297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6727accc147742332f8fe315d6abdcfcb7b0d388733c256a4c2d9ccd88aa420. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/PLC062407189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x270dd331cdc62b624861775de24c0f8124b8368383034e21d9aa9361ad96805c. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/PLC062419007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c5b7c2a54f150f4f86daf1bee8db0d0a00691ea3c06d736f9a1dcbd38953eb8. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T17:50:01Z), 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/PLC062410568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58fac3d298cdc9765911a679ac9a4793a78d5188d3bcfecfeba51e47380b6b02. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/PLC062398175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff3057a44e098c90bc84657028e835b73adb896895185e5dc4fcafdd97ca40d8. 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/PLC062419006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5560d2c0a8ceddfac1f8ab4ab809d09110c05297d87d2571d34fb6fb667fe09. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/PLC062422478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf923dbc61af2e2f6c7529852c35d03e3d7c39c06f56a668b1db8af3f1d288f36. 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/PLC062422479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03a005f8e6b3a32cc6ee3ce157b36a567bfedfa3c9d030154c1643d83b582721. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/PLC062422481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e186df3cd3e65beb123fe1041bd71ec400b8a34d02c4237ee4bab731982bee8. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/PLC062422482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc118df9d5c6f64a942a41bbe62896e496ad10e353ca175f4595c562c173e9213. Chain 2 (Bitcoin): anchored in block 958695 (2026-07-19T07:37:00Z), 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/PLC062419002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25571c4030585fe1a20a778cab603f9857d944758c7f462420437027ad8fb99c. Chain 2 (Bitcoin): anchored in block 958865 (2026-07-20T13:10:19Z), 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/PLC062419003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc079fca82a9e8644a42e13bbb1d7d56bd48e8df05b17b1b9467f2276be31c405. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-17T00:00:16Z), 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/PLC062431440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x327d8ecc445a96ea908de58995a934e8f0ba2a294b4f70300ee556db517a83f5. 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/PLC062434916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf009532df355f05ab95bf7dccf3886989ab3c8508b93d54267be3acedbe223cf. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/PLC062400373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf009532df355f05ab95bf7dccf3886989ab3c8508b93d54267be3acedbe223cf. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/PLC062400373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf009532df355f05ab95bf7dccf3886989ab3c8508b93d54267be3acedbe223cf. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/PLC062400373.