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 0xff58f75bd81ea76e23b0d7d65410cd0c83fd511d99fa03581c646f3ca27f02ab. 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/5742a49c-ef94-412a-9f60-5a5a80c2755c.json and https://artists.proofprofile.net/proofs/artist/5742a49c-ef94-412a-9f60-5a5a80c2755c.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 0x13295d2c6d8223e40e4d888a681764cfa21361679b41e20adf11eb5d44403e4c. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZDA52194861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe66382023c1119e28e5858d7a37cf9523aee2c57b1c07a7d6fac60dd88d70d5f. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZDA52194863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40b2169db96a2b3fa921db450fa42af722b69961ae27e12f54b3a1aab4217e9c. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZDA52194866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66640d086aa1b4e4c299a9d08fcf1ab1b2130924c0845c0ccc5e0c4ce7c2841c. 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/QZDA72140087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dc3ccde16bc6577927169d63c404d16996bfdc5da4146148efd15d097901285. 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/QZDA72140090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e21900d8e21dcacbb7f81d86f2fba44b4b8da88a32f2434cfc628bd727875a8. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/QZDA72140091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc62804c0710669963345ad18f31af66edb4a24f06ccfce61c08f61af43dc8d46. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZDA72140094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a847169e4c4456f08ef935e280f53149586f6640460c2e2725bfc95ab8a9fe9. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZDA72140095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf25f9d44272a99c240b7411bf1c2e69a63b5ee9199e798e0710a7d2a318811b6. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T17:58:08Z), 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/QZDA72140098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fe0cb24251cdec67a1e0a17e83832cb1ff2fa1162299b5f188ac948bebdd8cf. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/QZDA72137741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7828f15e9efae8c8b60481132162cd43c1a6405aa093b6c540a8f33717273b2a. 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/QZDA72137743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ea2fde0771da46e9c7af34179e0883a74ab26d71f4ae8e063220ce2064b11c7. Chain 2 (Bitcoin): anchored in block 958613 (2026-07-18T21:35:09Z), 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/QZDA72137747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc20225f7247b3834ff554a724e9cbf84c7c0a531d7e6dc356905253e833c191b. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QZDA72140125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b33bbafcae8d4855ea375b1db2e35c7f3d5ca40c5ccd7669a14c46232415a6f. Chain 2 (Bitcoin): anchored in block 958816 (2026-07-20T06:38:23Z), 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/QZDA72140133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45b2a68d44b4fefa1c494be2e8f3d33ec6ca5a0492163a98b04588313acb91fd. 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/QZDA72149546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x844e864c40b27068a8be4c2a4962a91825f0d4598bfa8048906c688cdaaed566. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T01:53:30Z), 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/QZMEM2158783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03b5fb366a73e63c21754e30988aab3a67c934c152f04ce6035db8d20b52cecf. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZMEM2158757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b579a86ec7c3b772cf4300431cdce878a6cb734e111f41ab4ab4630a3c1af5d. 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/QZTAS2129336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06937b89a53e76881928e3015e64255431fbfbc530c555156d8e73e4c11aff1d. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:48:33Z), 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/QZK6H2292827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5d90ec00959f965cd6403e2787ccf0c3cf644faf57f7398cf07dd5577483e7a. Chain 2 (Bitcoin): anchored in block 956404 (2026-07-17T04:42:12Z), 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/QZK6H2295632.