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 0x44f84157e62f3c7dff78c799023254ea154193112962ff06abc9453523d1752e. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ef77f231-b4ac-409d-9122-ffa2473583ac.json and https://artists.proofprofile.net/proofs/artist/ef77f231-b4ac-409d-9122-ffa2473583ac.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 0x3041f9c7520798c1bdb8b607ee08636cb4423e63cd1fa2f9db81247754afd62d. 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/CAGOO2452212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf80538f9353222083a47dcc31bd40bd8f74c31799b65c181eb5ca9dc46cd50a. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/CAGOO2499412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x270ae3e2292cef916bdc7ba42f7cd08c09396a8905bb4c841a78f2375d2fe5b5. 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/CALVP2409688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7717e1e3e773a6e3c17b3c5decfaf7ffd58c782ae0b15d70b85db493f055d63d. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T07:02:07Z), 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/CALVP2411586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd91d586883e337b529ad97c206462a12cb67baedadc497c8ca70cd1592beee3a. Chain 2 (Bitcoin): anchored in block 958401 (2026-07-17T11:10:25Z), 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/CALVP2414993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7b399b70c81486595127814d806356b1a24020b86b7c73268226fd21daeba9a. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T18:40:06Z), 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/CBEYJ2442996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb70cd2477d621b9bde762757be2c079193d9b4628c5bc327437a265529f2bf97. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T14:03:13Z), 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/CBEYJ2423679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53cab37647e2020f3b481466fe8f5172ea4f13ba6718d4ee8fabbdb297d9accd. 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/CBEYJ2454206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba435776f1d46d025418585a702c9157813979941f68bd6fbc1fe175f336dc00. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/CALVP2473321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76ae4af0b51f076be17dceec41153e29af183f7dc8998bc3db5c57b29e241ba5. 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/CBF8B2477384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3acb6128a8815b93ec63888aef25a95ea4b012355ea5a8647e3da1692a096857. 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/CALVP2473367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e6a9e3fffc9a9c484334a95148e90737402a0e737e8c5203ddad9e17e88d151. Chain 2 (Bitcoin): anchored in block 958667 (2026-07-19T05:04:54Z), 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/CALVP2473378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9c4187966c6292dd9fff15ab4e705944773a7cf95a8eca29713ff68b37e81e0. 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/CALVP2473384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd91d586883e337b529ad97c206462a12cb67baedadc497c8ca70cd1592beee3a. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:44:16Z), 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/CALVP2414993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x270ae3e2292cef916bdc7ba42f7cd08c09396a8905bb4c841a78f2375d2fe5b5. 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/CALVP2409688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e6a9e3fffc9a9c484334a95148e90737402a0e737e8c5203ddad9e17e88d151. 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/CALVP2473378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3acb6128a8815b93ec63888aef25a95ea4b012355ea5a8647e3da1692a096857. 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/CALVP2473367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9c4187966c6292dd9fff15ab4e705944773a7cf95a8eca29713ff68b37e81e0. 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/CALVP2473384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7717e1e3e773a6e3c17b3c5decfaf7ffd58c782ae0b15d70b85db493f055d63d. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/CALVP2411586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76ae4af0b51f076be17dceec41153e29af183f7dc8998bc3db5c57b29e241ba5. 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/CBF8B2477384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ba6a15cdf6c535e5cb6b4c6897e8aeeadea646d6c6a740074f32853b48e28d5. 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/CAHQJ2521290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9af1d33da62087fecc6777283f56e6fd8decd72d524c08d6cb81887c908547b6. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/CAHQJ2521334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcad3faaef4980dbde444abd01fa9dde3c732f07ce49bd944c5ba3af745a7be1b. Chain 2 (Bitcoin): anchored in block 957772 (2026-07-12T23:31:17Z), 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/CAHQJ2521344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29570f78dc449e176a02fc70b4679cb21e174f11ec9be1cb33a82ac31f8ff74b. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T07:21:09Z), 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/CAHQJ2521350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb820645cd3557ad54a27d174022cd5947e561fa2c18b1b697b772ae14efb963e. 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/CAHQJ2521396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb820645cd3557ad54a27d174022cd5947e561fa2c18b1b697b772ae14efb963e. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/CAHQJ2521396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67a13550d8360a7b64b8c08422713a0f5444698008165409247714e2bb324c90. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/CAHQJ2521341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29570f78dc449e176a02fc70b4679cb21e174f11ec9be1cb33a82ac31f8ff74b. Chain 2 (Bitcoin): anchored in block 958861 (2026-07-20T10:02:52Z), 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/CAHQJ2521350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8a6233b34a83addd298bed00e73ddf7f72019cac6e67f6c278c05bad410a5fa. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:02:06Z), 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/CAHQJ2521313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a3e3383f41f12c89cb2a189de3cb2e54d37f93319ee5e13365d8653f5800d1d. 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/CAHQJ2521308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28dc7aeb9892c4ff10a693a566bfb0ef7a0cb90734e9c5afd2aa9adbb7e924b6. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/CAENV2501530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28dc7aeb9892c4ff10a693a566bfb0ef7a0cb90734e9c5afd2aa9adbb7e924b6. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/CAENV2501530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0ab7227931d2da0b2280d7257a6661aa6b9b2c05b6a6d745996b03d6d7e9255. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:46:27Z), 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/CAGOO2593308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d82d6a33565405047fd529b18d7912d1ef4220c7f1d12c38a3f86e9ffd75a24. 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/CAGOO2593307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f5379b0691ef53161cd15d101350b79802d5ffe25461dbe94f4be7bacc81d76. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/CALVP2534407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f5379b0691ef53161cd15d101350b79802d5ffe25461dbe94f4be7bacc81d76. 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/CALVP2534407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19d55dd1e5dcdc8cf37d553484209d1b9a3c108c65e6ad0417abb1602092660a. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:51:02Z), 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/CALVP2594937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3b62d08e73261efd3f2fda5ee134dd94a2af5850c218edf72c85eb2fe3d1eca. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/CALVP2594967.