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 0xb8f0e174a2cb07ece3e0641755e88750bf2f79988e10a45b04e53b5ddd97f587. 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/9b78ebb6-6e7b-435f-83cf-e2a0d1bce733.json and https://artists.proofprofile.net/proofs/artist/9b78ebb6-6e7b-435f-83cf-e2a0d1bce733.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 0x7241ed96198bf1ae0d81c27b0c987669e896de70447a28b87b2dd94d31fb848e. 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/QZZ7M2449470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70bd1e2f887d0fba23bb356b0d50d4b54a714e8e14ecaad05668d3d3359d358b. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/QZZ7M2449475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13609cf0cb7048ee68ddd0265d35daf5600cb98bb3bdbbbed64a77cadd16016b. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/QZZ7P2464455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d30aaa383e73e7e64731f565759dd6bd539501af33830a759c21424a37aabb5. 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/QZZ7P2464456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8015291b448ee52d16880284abd8541be1286471b151f8b13d294685403ef7b0. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZZ7P2464458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x198bf03e364ed387499e39c83de1db7f209b4f6affac095a2b32fbfe892c7485. 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/QZZ7P2464461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35b58e29501322993053e590a83783f840b4b5095d14afb3eea81c95716020b7. 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/QZZ7P2464463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0cc8f72c1be61c38f916ccfba150345ac33768671e47884d028e745e46de7c8. 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/QZZ7P2464464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76a89e3158a6563cc344404231d61dc79e2b37bcf43cb4cf18088eb4afa00cda. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/QZZ7Q2448986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb8cb92de32a41aaa4221a12d2784b835d4b29caf64d46b02c88b9f583bc8c4b. 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/QZZ7Q2448999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d568e896e45bcdb018119162db3c8048762400ad29cb7c24845d5c3159a90ee. 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/QZZ7R2480888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59fd65dafd24e03dc10e0764d46f3f720957d0e8fdc468e580d40f8477c124d7. 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/QZZ7U2425547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02941eac76a68ba13cd3888cde8f7f9debfd56f2a56a948e2d9b257bb7284231. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZZ7U2425548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04f10e5a3cb09790b48d1669eb281cee8cef6df52c3e1ed46578db41f917d592. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T02:35:01Z), 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/QZZ7U2425561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x064d1610a3c6115fa020c5fcd1b2e8d9f5180537be566f48f11ffa0d589e5cd6. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/QZZ7V2457680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a220ba7a53ad30519132ff2c4875327f3aaff28e6c30615a214471062d27f2d. Chain 2 (Bitcoin): anchored in block 958493 (2026-07-18T04:34:53Z), 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/QZZ7V2457683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49d1fe4c4fbfc765680c7d2a0033d4b56a946489701531dca4f60c26fc930327. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-20T01:33:59Z), 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/QZZ7V2457688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0599b3f88782133a19a8280ea2c365e2fc23334d2de8e8acb27a0903f0c62a11. Chain 2 (Bitcoin): anchored in block 959002 (2026-07-21T13:47:18Z), 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/QZZ7V2457689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x489a37b38ad21fc50fff09cac0c3d7d4c32610e1a977625a359658b9dd9a144b. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/QT3EY2408086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd67320012da7d58da3c6256a21afb95e08f5d01e7642ba58b154a052fc913b8a. 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/QT3EZ2447728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98a3cbaf4aa74a5f2a6078ccbb377df01dec751eb5b591ed5022798a7ce8e35d. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/QZHNA2539850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80fb2160756409ac50a7e6c3a132017881b0a274c1c4ff075fd8eaff468c20fb. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:38:04Z), 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/QZHNA2539856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x380075e0d3dbb747d3dcf834d292f9434470838437b200d3af6eccc4c7ea6ae1. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/QZK6Q2527966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ae632ff65c5822efe21e6f1d0da384bf7b4e063369bbcbf400c13b269a992ed. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QZK6Q2527967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93f7db055faf0834a3e3eb193607ae5cd897e1ad1b5882174b8211304b774338. 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/QZK6Q2527968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27be508999f127a29272a8784f206423f2cb961997f190daa8c14d3bc322feb9. 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/QZK6Q2527969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5a350027bd1e703efd90d70dac999e5083f9d8fa9492f23abb41718f0683f33. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZK6Q2527970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fa9ff58a7d23b3a76f0e2119274f4eac84392505ad271c1d92b078571bda053. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QZK6Q2527971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08edec36b9f33ee7de2875f6fccb55f70ccdba590bd4b314229a46dd20f63679. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:05:00Z), 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/QZK6Q2527972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa7c92c51e73173f060bc529e5bcdc298ce0df90f6017e69add536d10deb92ee. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/QZK6Q2527973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x654f9aec2d20e5cc51b1d6965ecad9ecd8142049a93d95a3e9760da919c3af93. 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/QZK6Q2527974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4547fb9f10a5227beb22db910256d273d5f514aeacbedc929ef5689a52d93514. 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/QZK6Q2527975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54ce87fd88862d03dfd9a0b7a047435cb87e67e87a79275a7d92bb6e3ea4a01d. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QZK6Q2527976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b269589146d62e59e641569ccb83ae082769c93d47e88221eb62ae50a589d69. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T16:34:22Z), 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/QZWFK2573600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88321f65f3715309c908155eecd153000a5e418c8db6abf433d006bf4692c160. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T02:32:04Z), 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/QZWFT2563285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23f0be056b4692bdb79112a313cba5fa5b6c2361c367c120f0fea008cab5af93. 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/QZWFT2563286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f9b00cd836cc10652ddd017747dc73443b73f6106f1f2339f66349b50290c9f. 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/QZWFT2563287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e12ed74908599382bc31bd69c4958bc6a1079c5ed1a33e270c5fb081fd5bcf1. 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/QT3FG2587639.