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 0xf208e16b535f84a8d43544bfe77d5d44ff24a422e32655006f52d581c3fae276. Chain 2 (Bitcoin): anchored in block 953605 (2026-06-14T07:39:50Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1159241d-d8d8-4196-a92e-4a417728c105.json and https://artists.proofprofile.net/proofs/artist/1159241d-d8d8-4196-a92e-4a417728c105.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 0x5ab3853455751909be18bd5191ee5b52917c12c125cbcd42f5e40c5f1907ad1c. 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/QT3EY2426982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05942f793ec96f40989c1220f118c1cd4219bee923112275ed7e96627b3d325c. Chain 2 (Bitcoin): anchored in block 958635 (2026-07-19T00:58:42Z), 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/QT3EY2415778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f1f4e0f2e3ef8f2115252af0c8312093811a87ac0bb87011817cf8434a18a50. 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/QT3EY2415791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee96db628db1d5b3ddace75f924c72b33fd5796b95fd574d75635993c207d729. 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/QZFYZ2584162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b899ce66445597a68f10de1a691ec7289c7484428711223ea0f359a56202ae3. 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/QZFZ22500133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24fbc40a1c2c70dc5a69bcbaa4c618ab49da158bc5bbb519a6aa779a9d039470. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-20T00:22:50Z), 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/QZTAU2592389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a0b86cd8c815107d2e407394348a6dd5d4ba5d4ebdb5e81a29caa4d6450305b. 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/QZTAU2592390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc16e73149cad9e6000253e050d478bee47f0eaa67d719b7dd36b0db606a0cee. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZTAU2592391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b4fee0af2b5d70611945e84fc2d8b8e6c5b282a48f2136faed8665e2a7eedc4. Chain 2 (Bitcoin): anchored in block 958590 (2026-07-18T17:28:56Z), 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/QZTAU2592392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1f924ad1d1f80d52eb1e40ae02f868ebc13e1402d058911f1e72c4dd87a97af. 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/QZTAU2592393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa51f23d65fb9fe704876bd10cc45f631036976e7e7759328e8c20c6c79ecef15. 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/QZTAU2592394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d3d299ac00965317fe9906f90b335c8f4c41f7c7724a87cc637535186780a68. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZTAU2592395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01c686d3bbcf845e31962e3d336249bf1cc9221af9c8fd67c96d4c66d05015e0. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/QZTAU2592396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e83de6a3db45c3ac0d72b393e228131515a3a70b7637409de7c2aa76ae2ffca. 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/QZTAU2592397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbf23609ed05407d7f0b8a3f422c784c71798363f5654d974399c9b7ea097a31. 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/QZTAU2592398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26e6207392cb1979907cb4530ce006b615597d131cd095294ddff429870146e2. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/QZTAW2584205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8266f75cd2944c083b7604f244f2556e46f3ff07b2e6a142eececb4c9b32e24f. 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/QZTAW2584206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x996b0ef98e5fef1acc239a1d4637fafbf73abee0e0bfdf1c545137ec666d3b04. 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/QZTAY2519435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd31b0656e5f0de496012fd3485129690d794fb28a503f1a6b84e17bf929f85d. 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/QZTAY2519436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb6636ac02f863d33135a71595f4822ad3c91e8e8e427884fa46af765c75d145. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZTAY2519437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53a23edcac4ebf76d03c255c761b1a04f59265d784c4a659e32a1907f37c5eaa. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZTAY2519438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6e747e077f8ea131b8f0f009b7900226af68ab666a737829b11064aff1deeb2. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZTAY2519439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe641f8c974d110167569822032d1cb3a842c1d615668cdec60eaf743041fc6d. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/QZTAY2519440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d6eb1244581fb51f819001418af56519e396f51cf35e167d4ca89b55df021fe. 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/QZTAY2519441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa53591b1d628fb19e7c1e0bf4f3b6f2b65e7981e1c71ed8fd87c5c7bd2f60eb4. 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/QZTAY2519442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd959c17411beabeef0e388384172d7ccf5ba834e19ed3a69869b2a8095dd76a. 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/QZTAY2519443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x999b4595dc265b7c7e4cbd9e0127f4c5d53f54e93096244eeb518bfc4b267d54. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/QZTAY2519444.