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 0xdf7dce62fc47eff1a888bf0e82f8727659b5295525140ed302c99cd486b4ab17. 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/50ab0251-48c4-4334-9f8e-9144239b9372.json and https://artists.proofprofile.net/proofs/artist/50ab0251-48c4-4334-9f8e-9144239b9372.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 0x5415e037b4a06b1d39b31e4f99adcfa0a717a6cc9dc74e1ab0153c3d38d772ed. 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/QZHN62173407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5415e037b4a06b1d39b31e4f99adcfa0a717a6cc9dc74e1ab0153c3d38d772ed. 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/QZHN62173407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59ca0f37f3d6132a03bccb65ab0bc18ba37e7d796ebe9f6b9ffbf5460fd59184. 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/QZFZ72266971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8ab5434b452967f3153d1eba135de20ef24a32311c998bcbd4fcccda2ba3660. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:19:24Z), 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/QZES92256997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd23cad87e7b1a91b5c46568a613eef1497beb08d938940707e6affdb36569f0. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T17:39:26Z), 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/QZAKB2168390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ba766866a782a93919907854cc955795e391d310cf6c3d61f0b625d308031c9. Chain 2 (Bitcoin): anchored in block 957767 (2026-07-12T22:25:13Z), 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/QZAKB2168399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4584a7cab9ebef6d55b785b8d62b05d09cd1271bac687baa964dd5cdefb40d34. Chain 2 (Bitcoin): anchored in block 958514 (2026-07-18T06:54:37Z), 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/QZAKB2173099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a2128cc5974d31f9335ab535b1017ef544d1832bd34bd7a45a7897d03c2a6b7. 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/TLREW2231767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dade53e8b50b48538d0ccf3890b850d4334a31b425e9df60c2a66162c213d63. 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/TLREW2232069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x666e98a9d0e8f4ff7f19d89dfda7d3693958d0c7bf250ed41f53d6eceeb02666. 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/TLREW2231772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe70107a4dcd92c7fd6e34c2283babd98bc40c9e2a4d4e743acb0cdb01b3dc8fc. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZVEM2320168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ec2e1265bcb733e98ce5307fef8adb58e88e1eaf123fe5f8ba789064c9d6ed6. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/QZVEM2320170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9191d347ae5eba5ac772a6c534b887c7b1f9cd908b6d70afdece3bad894bb8d4. 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/QZVEM2320171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb47860d9f3ea0c2e1ea7a8b8f83add2e89295ce94dfcb0fa9d03ede2bbeea6bd. 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/QZVEM2311347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ecf42e57e2051288203372885ba11b335f1399ea8d6b5bb81e5d3be3a45740b. 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/QZVEM2311359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x494d81f7962585b07cc4b7b6a64a68b7aa1d8b005ad2c2a3dc9448ca7e13a66b. 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/QZVEM2311361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f25cc564086cb61b7a01e4f660e14e8e01f4f8914ee2fda5cda3d7d0083585d. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T16:09:21Z), 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/QZVEM2343530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x352e88662f2d45baf3346671d74cb7b462358dd7d9b2fbb7d95eaeff5d0dc77e. 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/QZVEM2343531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x561f57505b4d0ea89e57752cbd91b51cc77758843562ccbf04f9e90f30359273. 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/QZPEW2468365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a100d251663b941698d4cd9d487a98d74e8f38a01a6147ff9a7d07d0f4b5155. 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/QZTBF2415858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c50f33970cc1a82e9c05909cae23162d09ff3b610dacc09f644bde290243d3e. 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/QZTBF2415860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20fe16195a21b495c181d78269ea5406bbd0311219dc5c3e0b9a131968dfce51. 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/QZK6Q2517028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x820de011ab273cd578fbd686079e9aa67bfdcbe8b16383a9bfeed863aecdeb50. 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/QZFZ22338142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x820de011ab273cd578fbd686079e9aa67bfdcbe8b16383a9bfeed863aecdeb50. 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/QZFZ22338142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bc73ed87f35d69c1ba20fdc62cbf437ef0a07ac20e82b1df5f44dea23fea244. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/QZFZ72342092.
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