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 0xf7438eafd33efe85ea53484d27a08b93fb4c3415bb7add952be739bac368a4df. 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/8eaac135-f2be-44b1-a428-9b9b9281f73d.json and https://artists.proofprofile.net/proofs/artist/8eaac135-f2be-44b1-a428-9b9b9281f73d.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 0xf71e24a6b327754c5a97d09cc46e7ef5693a5ccf91d27017a31e37b750bb60ab. 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/QM4TX2167923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf33642c289d1efcf0f2fdbd077e277c97cf19df966fd99514051bfe0af9c2882. 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/TCAFL2121579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4dc1778ff452ddbf19542ec36ee3ee1c091ba465d4bd8401cf385fe3dddd144. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZNJV2122838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa228a067b0f4f81fc70b0a220c8edf098ce1c78f8569e909405c783009161fd. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/TCAFY2143455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25dd5b36193dfd65f4a0c2960722dd785e30e075b70124c3d3167ae2c203a85e. Chain 2 (Bitcoin): anchored in block 958627 (2026-07-18T23:33:54Z), 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/TCAFY2143484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83f259723cd0577a4778e278599c95befa34d5bc03c25daef91ded27b23a2483. Chain 2 (Bitcoin): anchored in block 958720 (2026-07-19T10:53:46Z), 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/TCAFY2143520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x114e8cd405380d02dd52593fe4d172641617560c679cc0c290b76129130ce95a. 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/TCAFY2143597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfb12479932a076251b1b4d0b34595dc1365cc281bc15cc5d66dd60f9780060b. 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/TCAFY2143650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94c913b8418ad1dd8c7a78906dd218d6f4f8804bff48f7459e36c52b234f1a1d. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/QZK6G2280004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91839d577265bc089e3d339399068831d42892f128744e950a72ca7413e59d32. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/TCAGQ2229296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32e86590637ef32a2552c83d172b149939efcf588908cdead5f51fc934c233d4. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/TCAGQ2229305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4b83d9ffcd7922901403ea050a4baf19cc0a0e00e66a36fa6a5819886484618. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/TCAGQ2229329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15200dafcc787d080e51c0f1010d89d24dc4c3eaaf9bd878a69a023465559a12. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/TCAHR2305440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26110e3145fe636205d71799f8a7d9cf82122fb1acd8f23ebf13f5cf0e859b4c. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/TCAID2463784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa351de96482c96a166d2bb221aa9ca74b3e2d222363cdc8c1ae0beff8c083ef2. Chain 2 (Bitcoin): anchored in block 957805 (2026-07-13T04:34:37Z), 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/TCAIE2463804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x783bb706c943c642c1781dc2993da0534630147c8a6c07242bb03bcde3adc045. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T12:08:19Z), 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/TCAID2463823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ced8f87c72a5ee38c209c6da6e13b64837faec1bf8ff529ff05b0d01a1d4b54. 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/TCAID2463860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd75a3a8a6c9101ec020f12149f82a34b8f8f43be0c689213410c567c11088f1. 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/TCAID2463897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x207c1c6a0cdba9dc3ebc9d0d2ecada36aa0c5a65a070dd98b99d6a8565f1b3a9. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T17:01:46Z), 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/TCAID2463955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa56b13e33fb2dae7ea6386b408cce6cab5900cc51e53e1a32e3da6761ab94848. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/TCAID2464030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9185db4c02e6a546a3aded43a588514aa92e699d251013a3549c946039e711bf. Chain 2 (Bitcoin): anchored in block 956748 (2026-07-05T05:55:59Z), 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/TCAID2464050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe82f35158d10edff96cfe95111d4af2ca2f89f45f3ef53f42dfce325116a7e19. Chain 2 (Bitcoin): anchored in block 956620 (2026-07-04T07:11:13Z), 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/TCAIY2404165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e349e1015161dacb5028f691b694729e10a67875b3f94d1be0b7f26e5ce625d. Chain 2 (Bitcoin): anchored in block 957523 (2026-07-11T04:55:40Z), 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/QZHN62577611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94c913b8418ad1dd8c7a78906dd218d6f4f8804bff48f7459e36c52b234f1a1d. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:48:28Z), 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/QZK6G2280004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3e6020885ac0e3a421f805845870fdc6b7ae90d176fcae6b512099b174e1e16. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/QZHN62577614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23660bd01341276e232cbad1bab4833b396987ad7c0c0e8046d8452114f25633. Chain 2 (Bitcoin): anchored in block 958124 (2026-07-15T11:01:44Z), 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/QZHN62577616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadef4e474a48246954f4ccf08484be52c5b0db637ed4baeea18de8ae5fc13f73. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/QZHN62577617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90730eab0a40ff190b74c3f7c6de0118d0e2560f1e811e4dab7f546649bb459f. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T17:51:20Z), 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/QZHN62577618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88492a76fbe7f75ddfec0764c13e30e712079339e79b914862ead2dfaa782a49. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T01:52:03Z), 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/QZWFH2332458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87df1777d6e3894a906336b1df1ee8c770fbbe7eed05bc8e34f4c98f42addcb7. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZHN62577620.