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 0x5cf96a95966d3c1f060543d2f439214552547d6aa8f0d34fdef4e78cd3f6a32b. Chain 2 (Bitcoin): anchored in block 953625 (2026-06-14T11:37:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/257f8c05-9c34-4a47-b916-1a2fe45da0f5.json and https://artists.proofprofile.net/proofs/artist/257f8c05-9c34-4a47-b916-1a2fe45da0f5.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 0x39f0b2670367ea8ed377a7dd642aa8dfb9af8560b2a23835d6c81aee96f89055. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T12:11:43Z), 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/GX53U2324955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7a8e0da45a992fff65983b7e0ff1a563b988e1b9000403f08db79775aff873f. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:46:44Z), 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/GX53U2324956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae89b005f31d417ab42eef3de1ea7923f9c97fc79b9fc6d2aa518787316d0639. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/GX53U2324957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf9aecc610c7ceb79f3015765107d6abcc5f81f59f6ded9305f86d738c80dbd1. 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/GX53U2324958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a4f1b4ed1825baad2f66eaef54b3d0c3e3cf5c8c58944ef12695a0a312f67a1. Chain 2 (Bitcoin): anchored in block 958865 (2026-07-20T13:19:31Z), 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/GX53U2324959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17e9dbb80aa4f476d5ceaa066eb1da9af4de81adf4e7595f9c8c77be7a9bd8b6. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:50:03Z), 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/GX53U2324960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a805eff6c8c66de51f8473cbeffd2665758e1a8acbd63c05b0e36847bf8521a. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T10:23:32Z), 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/GX53U2324961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92580f8c452681eedcd0199dfef8622bdf515f7056b4112682d045d130612308. 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/GX53U2324962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdb3bde61e7e4cab94619ef6760941d2bc46900b27ab2772589556835d4b5e70. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:42:41Z), 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/GX53U2324963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f4bf68d8e5ae0cc3dec4af1e1e3db290590b27867ad301c782e92ec90bdb7f8. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T05:51:11Z), 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/GX53U2324964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94da75bc97734c8099b89eb7371dd23d65d28b9487b611342d61180a1f59233b. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/GX53U2324965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a26de43e045b4ab382fbc4e037a591ad7f9f78d836f26e720c58105d443790c. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:11:05Z), 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/GX53U2324967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c39bbccb5255a717a9d1d386afcf968fcf25782e793a5e68caffd6ad47e4d72. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/GX53U2324969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x671dc127ae6b659310250d3ad8d7a95ca9e75dc2bdf342baddb9f63321048c00. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-17T00:17:08Z), 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/QZRP52596365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe25f6cd47efdc3376d4b80535f2da4ea502affb8140b5bf3fb0dcf063cce2cef. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZRP52597935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2777834d13603e319dbd4bbd48ea3849a7a49afe1339cd512cc9aff34b0fdca9. 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/QZRP52597957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8a70d368d07c243a375ce9a86f7b5ba583dbc0f9edb360549ce0c844cdeed53. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZRP52597922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c730e0242fbaa701766be9ce6c64e14ffc3b10724e5a84707131a6d7ffdfb54. 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/QZRP52597932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf55cc0af553e354d6b8238ad34a5a9abf3ba3720469c3b7e438ff36807e5504. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZRP52597929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x307dd717d75de623a22982986dd32804b4c6c3f291c7c2d6df4263e3fed54f30. 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/QZRP52597928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb8181f30cfb18995ca502efeed6eab5f91ff043aa89070fc03cdb39a136b0e2. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QZRP52585720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26b3f16fbc3ff3e72804eeceff3c397c6c0eecdb816cee1898667f6b59cab812. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QZRP52597924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98b453daa7591d6d910b132deec1660d6d41f672af58529d2648cca77ac71c0d. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZRP52583355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04e6eabba67f0443f84b6d5aba0d1f0a99616eadfecca6a6d8851d013c837952. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-19T22:59:45Z), 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/QZTAS2592636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd41f67025b16eb7a3ccc3313cc17ad218826d0b9f358d8c438cb7eb353160cb6. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:59:20Z), 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/QZTAS2590646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3766b7b0cfec238aca9a6fce5be3e5a0d3374869de4116a7c597e9ad5a30dfe. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZTAS2590658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb66cea406a384cb307c7134df2ba7f0bb828562aeeaa088bf458b016c4927776. 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/QZTAS2595362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdd1b8b2db6e4c4b2cd5f32f7426da4d6fa6808a5cc125395cee50b135245e65. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:44:38Z), 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/QZTAS2590701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00314858c9090501f48dad14534fb64f271a3630f3272448d296d97fc01b7c95. 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/QZTAS2590692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8817dc8909a8fbb6166cddd48ced2944447aedb7c6ac6568604b81159e6a971f. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:58:38Z), 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/QZTAS2588572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dd92edec3704c8a8d679c0c2b800a172f6a58bd2fa183b481d08df13d9128fb. 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/QZTAS2588671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13499c9075436f30d1370d2ff0fe36d563319dc713ed5ea87347e10ff8791a27. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T12:03:05Z), 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/QZTAS2592633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdea833a78b9cd6a2ab09f7a6e948dc516afd05114b4fea6aa7bc9c10463f3032. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T05:41:46Z), 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/QZTAS2590672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fbc36f64082e223828bacd71ab26012d57787a359ba4d71898ef628855c832e. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:02:01Z), 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/QZTAS2590694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2a447add8b0cecaca9e2ebf94a243dd7d06dc70781750cb026c72ea7f055cad. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T23:43:44Z), 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/QZTAS2590649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63acbe636613d9ee328713af895855661cea9f6f2b62e6b11714afedef600306. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:39:33Z), 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/QZTAS2590670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x074bf818e8e12b3692590ef85b31b53af0585ef823d4adb575a7ea596f6cdbe9. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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/QZTAS2590667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63df3ceead36e2ab7e7aa29d3f72ef474f30b926bccf9f15e8aed2131d6bbbd3. 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/QZTAS2592634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6685ae88b27376aa98f0af7bdf23b48fc34abda41c191345757946966c5e824. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZTAT2528457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x390f1f3e499b026be473befcc1cf2bf30246903c0062de58320522f956da3b7b. 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/QMBZ92526476.