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 0xe6dc1effe6cbc4dda03b21c9f47b22d765da969481f3f964830a7086b4d69724. Chain 2 (Bitcoin): anchored in block 953695 (2026-06-14T21:42:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/708ccae3-3ebe-4e20-b774-4cb907209b00.json and https://artists.proofprofile.net/proofs/artist/708ccae3-3ebe-4e20-b774-4cb907209b00.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 0x525742f6baeb31c20f06ae540589004099e01fed28dc38fa8ca450f7a1073d47. 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/QZNJX2110985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ae2f690f7a53619c394ce783755754cbdf5c75e70dbddbc1ef50e4ce0d04f39. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QM42K2395553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb7198d53c5fe24bd26cd1f09d551f75183529b83ee1acef165a5e49c010e973. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZS672140849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52b37c1c11b71717580ffbe1e8e160160e4dfd16485005578a12ea1676203043. 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/NLCK41084533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dfeb7c78404c913bbae5678ea0a15c89cf51ccede969c430bebc007fabb7f5e. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZH5E2016632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f45ccd54d48a10a718bf3646ec00456e328b5d8f2bbd10b3b7e53b5c9b04281. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZH5E2016617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0abc1d0d3d55550022b1c3ab84f608eb3644144e4037ffe260ddeb1b90b572f5. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/QZH5E2016647.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd38b8b994bcc2c85d10824f0e6b418f810057499375716b23f51fb6474b469e. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/CACWV2058525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c7b66da038218ad4126591ecbf9d64199b86828131a42f8f39e7ef5d4436fd7. 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/CAHQJ2111462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f5dfd034e09642bb2f6e5c8619dbdb91c7be4ca174eaeb5f01fb8c6df547515. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZHZD1930023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12ff2766a1399cb02466bcb18ba68bf8df0b6847936e745db84db6752c0ad55e. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZHZD1930024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9dfc6d8a2c3c9969e974c9d6630b49abe4c90a228e868d70cb25159adaca07d. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZHZD1930035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34fb23985e51ddb44c06ebad8098efc52af0e35f92798f1b4f2ca5e2e9224278. 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/QZHZD1930037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x685a164bd052df6d61c3511e0f72a7091b3a9a48f6d7ed7e1128db0e5bf35936. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZHZD1930039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19a628fe7718d00356346dc2eb3322e758f7f3f8d130021ad7ba4e3960cce234. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/CH6541668196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8500b73001651e43256a3f298e540b3d4589fa99c7c88c5a062079b4c5ae7946. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/CH6541668197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea3c38401da5df612a82d9e226096e30c84c9fd9b07c166d82b7e9d32ac8d6af. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/CH6541668198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3c21253979dc4066d483fef4b59f5ff65a61a1576ba935cd114068fe1b3aa0b. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/NLCK41061759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa814f38b3c8815208a8d5d2bc6e7482bfce043fcdf1ed78531314d607ff6e6c. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/NLCK41061760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0ab520034c84e043ac713d36ddfcfcd7e3ac724ddd0148c700fffc3d602720b. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/DEZN82112505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcea9f25be727ac3d91ab8e98a61dc843cc43d44889973fd4ebe81c19f9f68a5d. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DEZN82112506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87e8bf925dfc21a3fc1c9e003354e59998d4f4626e9d6979fd9db7f8b9e3e4f7. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/DEZN82112509.