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 0x9304073fc6fc838ef1bdbc44620d3415c5b21c4fdfa286b6067cdacb4d903f07. 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/9d6f71fe-3675-487f-9610-9bbc19607a56.json and https://artists.proofprofile.net/proofs/artist/9d6f71fe-3675-487f-9610-9bbc19607a56.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 0x4da5f530dde1ad12bec7753568b361d9ba3c693bede0e7e17946fc8f0c9c09ee. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZNWU2056691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa649cef86ff6ceca917129967ef73a313cc6d4c4fe00626cc10fe7420dd2d298. 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/QZMEP2116069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2c7ae0d1477080e709b0eb46172c012a0fe1ef8dcb4a6cf08aabe46f8c46fef. 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/QZK6J2211288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee56f7841c063c2fbd8193243c73c245eb5394c671e1a5984677569beff22bbe. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZK6Q2296024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a4fc85ad2af8b9f137840be2ebb5370676faa7eea40b9f74f239c44d8b666de. 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/QZK6H2289322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa1be3b58d76aa9f47e52ef0d2c4bc6d1c88dfc568f3397c833fbec9fd11f252. 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/QZNWU2231198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x626c140946428c0237df563f06083c7678f9aed13f33d01284a653e802d12d02. 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/QZNWW2281985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x546e400e18cd29fe5a617921437c5595a6f148faf1e0dc251c0b28f9264859cb. 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/QZDA82347380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x712f08bf12654b024b07b7a466a2031a845d3992adb0bfbdf314ce644f3748fb. 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/QZHN42302523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe68a5795faa7a05aee46721aae20cb0d55627c5d6d81eae3a780ac2a31af8283. 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/QZK6Q2331534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76915e8454dab8ac830da4569454d6124447bb8accb0c7586b1c7279f55fdc60. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZMEP2312249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87177d3b759bdcdd3a36bd96289e92dbdba37364dbdcbd8b5a97448c909fc99e. 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/QZFYX2492725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb5c5aa8339defcd55d44a8e2788ffca75157da99608a0195f98c6312b34baa1. 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/QZHN82481549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x671028b4d6b0a56d7678fa92b09e8fde7fc9a94f2e505c9a256d16252e003ff3. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZTB32465277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d087bfe670cfc7588d5a932f461451c66fb31b69421d5735c811b6fd69cfe01. 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/QZTB42476521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8c8a502fe1d0a29486646a28391115542bd4b7acc399e9b0beea876de73909e. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-20T00:19:30Z), 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/QZTB72475163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd19684f7f86ac0c0e8e4fc27700f3ad1609df587b0e465d4a0c1421c27a13f4. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZTBA2447320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa246cf92cc6a6bb3a3428aafb2987e108d23fb1eb14a91f8111ecc6475f51cc1. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T08:23:24Z), 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/QZWFF2466385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x459aebd7527574cef0c4cfbe209b5d68736e2da7697d127f4c1688c05659b2b7. 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/QZZ7U2490681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa82b3046d76c92053b63034caaae1d5d915353a6f2e7c1a248d2550406996991. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/QT3EZ2497951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd471b8538a9dfaa308b4a80e0a7b55260fded22152a71de677f76fd1cdd55071. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/QT3F32490697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x229f56b9951447ac197d4c2a0032deadd7799618e31dbfc6182fef2ef373a83d. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/QT3F42437288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7742f61bc56788f7bdec53458ac3df7fa8e86bb1aa1e52ff696467a29c4ca285. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/QZFYY2509867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13ebd06629472124c9021ee25474f4811fd7a4149e619f89749c48e81d37beaf. Chain 2 (Bitcoin): anchored in block 957884 (2026-07-13T16:55:06Z), 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/QZFZ72576505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6980249f78655893cf50b75a4231d4d299cefe56f7dc508e685db03d809836c5. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZHNB2570203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cf4516e8823ca692111a0ba2f92757955033f7bc7003823a49b3b003f04d2cf. 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/QT3F22557910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b4491e92444db60d538222acff0253ad58b0cafb3ebd5d8997b0a32f8f1df11. Chain 2 (Bitcoin): anchored in block 958830 (2026-07-20T08:21:46Z), 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/QT3FB2518853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x397c471b927d51eb5adee45d6f3e2e7870bd5a24c561d21e77ffe167d38cbc50. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:00:04Z), 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/QT3FD2531019.