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 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 0x418e12e72b42a28d81a706aec2be3d9047638d9c2eaffffa03f6e254faad48a1. 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/69441d4a-67a0-469e-896d-94e53a394d89.json and https://artists.proofprofile.net/proofs/artist/69441d4a-67a0-469e-896d-94e53a394d89.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 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 0x8e27cdb47403763ec211503f2a29bc20fd90463f411220a028c1b6ecf165d52d. 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/DELJ82001935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e9dc5cdadb70e5641a606e863e794291e6a65e5f339e31b63158b0dcc734b19. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/DELJ82001937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76b306b53d8ec539baf2e07a5f58124339a7d1e58f69375edbfcc9a13170da73. 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/DELJ82001938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd184ddbebcfddb535b9fddac39c4953a772d6d8e9e6092c7822930f56def2fd2. 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/DELJ82001939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7a6352205f82bf1153f77fff4ac0d76d403e8d48de2a4b49b964d504964ba54. 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/DELJ82001940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c6df982f33f37c8056b9575e84b18cb701c627f0674a07685be0b624cc83211. Chain 2 (Bitcoin): anchored in block 958535 (2026-07-18T09:42:49Z), 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/DELJ82001941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x658393676fa7654db3b4fc6b62ae7d6f62af70b3f191af7aef5a1f02b5258be9. 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/DEZC62008406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25eea6b524cb2d87811398a5a2941f2eacbbd958d4e0974878638a6b7858fb75. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/DEZC62043863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60e3e593e1cb06236f3dc3a01b70e9e60770400974b1e5a9c0b58861b992d897. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/DEZC62197046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x761fab61ec8991a0f9141fa28ee558fc2c10cd32c19f48de2622a90a25b8383c. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/DEZC62197047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7fbcd64cbf799633f702b671f3a2a3f45672103ddb89e57574844fa00dad521. 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/DEZC62197048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d69222daa992174ef1ba4e2ecb9fd5b97f5fbac8e1d06278b8a0609d95259ef. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/DEZC62197049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c048fef04fb6733777f9397cda6d245c9706fa80d211eb0bd87566796908ec3. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T05:02:52Z), 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/DEZC62197050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22438c8e44b0b68016ade4c88b94fead1081defa70033d1e6cb4ade14a7cbd24. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/DEZC62197051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaa8ed3867417ca2e0314299b4b466c50e5d84ffbe99ca5db8f07132564bb16c. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/DEZC62113117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x545d2e3cce650117396683da29c0597de3edd4dd5c73b593db0f4e4dc21031d4. Chain 2 (Bitcoin): anchored in block 959013 (2026-07-21T13:39:11Z), 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/DEZC62249055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5990732c8b8b28eed3dae1a25d38bdd7ed8cc969d2acee26cb88952a01bfa00a. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T07:48:27Z), 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/DEZC62249056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa12137526a3aa2dde345fa3396df2082d370c952a71d8b817337c5a2d97c2df4. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/DEZC62249057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf0379508da2a319c05c80a37e9c55b2c34a97b148a5fd35a550a24d2e8a4cf8. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/DEZC62249058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe5d2271d91ffa267c1086ff28f7f096144c11e9a16075b759a6e845311bb661. Chain 2 (Bitcoin): anchored in block 958830 (2026-07-20T05:30:12Z), 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/DEZC62249059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b938bd283f9f9885c1b2e61a024414388d2280274a4c458c6a1785317dea944. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/DEZC62249060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb01339cee458674d961734dbee31ad09556036f9ea18fce5c8d151c8397b9423. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/DEZC62249061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e3f077d648d490f2e71ba4663978b88200b91a9aabdebc0f41901abb64aae4a. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/DEZC62249062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a3458c38a044ebfdd2400e63da4bd4d6a5d0e24770a035a2475e64a0cad2229. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/DEZC62357782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a488342e6926fcc37271e2754a1bd29d6e727cac2b0c8797af101aee27e4d7b. 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/DEZC62450908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb65d1dc64d6879a4a2f973ee04934c35ffa46cc2436a819bc55c48dd4208f429. 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/DEZC62450909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a0e89465cee47c6c6a6caa9e69f7d98607f587c5bc65c99a2f812f10e7fbe48. 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/DEZC62450910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf33e69a8f5917a4471aeea5d9671398b3bbe80fbfa462645aeb8e5a8f24726d. 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/DEZC62450911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaeae561fab04b1408abbabe81c7fab65bb903e0bd5438354356a60ab8a85cedf. 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/DEZC62450912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3537c580e100bea90973e7d4cf50478683ec36914f3e06c64af5dc6701da0c52. 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/DEZC62450913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ca07cd78b5d96b33178ac64391e0f7227aedffb0c758488b5ef87b82ac2b4cc. 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/DEZC62450914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6e405df87b58ff63081fd1b6493e7f7bd9e54f2bdb2962a5c8944b73d849cf7. 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/DEZC62450915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x832e370b71888cec32284dcf315d7a7d4f69c36bdcf55d6ff73edb14368ee04d. 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/DEZC62450916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b70a3a649994a3ba8b5b4eff1be15ef775430b41ae8ec1b02accf1ced25c594. 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/DEZC62450917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf277216c1760a5fb78dd3390c6e8b48f9aa764c6904891b53a65baf8a63ebb2a. 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/DEZC62589392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33fdeea3038cee954af8095ce3f65c92e4b8350fd9ffb4df5a1c819eeaed7201. 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/DEDG61600040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x661d0881878b5f64724d16ac11904fd5fb36d19b2534feb3f57f95040af29472. 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/DEZC62403930.