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 0x97190640d0f7856d48331c8c3a3cbd2b3692dd96213d3625cd531c0ca150e562. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1ce3dfc9-9683-4283-bb1f-5711ab06802f.json and https://artists.proofprofile.net/proofs/artist/1ce3dfc9-9683-4283-bb1f-5711ab06802f.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 0xd2a27c7dc8e6918688b03db6890bbcfb10fa0618abaf824a3a94a2b8e923715e. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/QZFZ72086955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd782d0d60ffe65b0f0c95f855b6cca6f809ce2973d15c7637718ddd4dbb4885d. 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/QZFZ72086956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66f760605adc429b7e9f6044ab10560c5ad54cefb54cebeb24779ef11eab4c08. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/QZFZ72086957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd561787b9c7841d959c0b0c3ae3d78506a1bb532719f1474fad079b67d1faf5e. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QZK6F2122974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67ae885de80f4ebcbe00256166e8e86abe525dc87c91e1f49b26dee661cc9baa. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZFYZ2292803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7ba51df31bb57aa177d562c6d4a13a1973469457a5f92c3519e8203887c5878. 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/QZFYZ2292806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a4386c865cca4070e489a4c373e8574c2b1e715da92b6f03cdeb7732c8a0013. 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/QZFYZ2292807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42a5b49dad18bc50aa8152a20e6039c6749cb8d689fc3e8d533f18357a809941. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:21:47Z), 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/QZNWY2361314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a25b8abffa55db9e9819eec89fb15c43fb9eb6218fc7b18d2b1f946f4e001db. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZTB32336083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0ceb1198faa4f47257bfe5c109ca38713722000e1bef63a7de13e45f2c0654b. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZTB62380574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c21bf08174696ff904b5e24bcaf6f9d9aee49e2d847fe63de7d6901b3723e76. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZFZ62469446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa12e45eaa95ad3d21d6b10439f80e25a764e68fc5fc99c23e993f32f295ff45e. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), 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/QZDA82424091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x571c8577e1d364fa12dd5c454bb160d6ae70d602f34ce172503d4c70134b5e2d. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/QZDA82424092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb07faf42be7d9111c68a0390e3a4899be4f630cec51c696706ce2a35614bbaa7. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:57:16Z), 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/QZDA82424093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ee7dd5bd7d3d05b0b93710a94e7fd9551a5de002b72faf4595a013fb2304116. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), 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/QZHN32475014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fe2b92513c5078b42b6101d3b1f9c86a13e2f998b201471d572d52fa63b96f0. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/QZK6N2442261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d13a15504e7557ea1faa599d06a5a89df736ba3e49f23885b11f5bbbd3be948. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/QZMEQ2451794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1bbee7bee3e766e32bb288c873faf30ea3753f52c11d09317f3abd1fe1e6138. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZMEQ2451795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b7bc3806c0f3ea816b75c8911a2fd37336f6520e8fb102a2eb3d1d32301ae2d. 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/QZPLS2464272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6248fd0df22cd6112910a9de07ec5b6e847c3b9e6d5e097dcb0b747b519cf2c. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-19T22:07:06Z), 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/QZPLS2464273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e20024a1a0e471719e4598d0288c729be733b9cf084be6eaddb36d5fd6d0854. 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/QZPLS2464274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23f7740176a6568b86ea5151ab27251de39050530564c99fd383f675af4133d8. 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/QZTAU2422386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d1f6e4f1e578790e3851e4789c92405db67dde15dfdcf9affb21ba40decd466. 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/QZTB42413419.