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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd8288ae81e04f53ab24dcbd58158ed8b77b35574c0f0542697685aa1be081cc. 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/b31373a1-5a7c-4eaa-b924-acbf8b26048f.json and https://artists.proofprofile.net/proofs/artist/b31373a1-5a7c-4eaa-b924-acbf8b26048f.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x477c0fc59fa9669d4e439ce42f6547bf0466dc987c12633154d62b0b200b5fb6. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/SEVLW1600203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3255ab380a313438132411dd9ba6b88cf2e720af249c101339e998c583327fd5. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T00:52:19Z), 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/SEVLW1600205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfddb0e027254a9c766b3f95d2c0463ea108145a5507993ec0fd4ac881bd1f6e. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/SEVLW1600206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59020da1e8aa010a0095daf2fcc5d0c560b3c1ebca06b683ab6daaf457bf82e7. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/SEVLW1600207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9968a8d8750e3418b9268ed8003b7c53b7c621d5594b7c45ac81311019da2b7e. 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/SEVLW1600209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f01c4a66202aa538ebb1f2fbac18de524fca30f961ae93c6d95c3f4642c526d. 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/SEVLW1600210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3aa7d72aa2c89586e0569cb4b28159c451f2bc0cfba813e695de12adb50b099a. 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/SEVLW1600211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb41a422fd347f44d81e161956952d463728c3351fec91a98c1a9e7e6e6fc1f57. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/SEVLW1800901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfab7da53c79b783999b27f66807ddebbf53ee714a9e110c51b2978f3f43a6dbd. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/SEVLW1800902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cf598fbc47651f255346146bb312664b55c81fdc08738b2cabec75f267382d2. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/SEVLW1800903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb15341d37633d546d11d7da4bf37fe7c0abbd72bc238ca5ed75b80be0afad6e8. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/SEVLW1800904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6be228252b63beba668bfc74747cceb5c9a427a5940ec61a33bc6af44d682827. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/SEVLW1800905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7837ed9885386d4ab27f20e50638bafb0264dd09a9a47d4d85f5a1426d8f4ade. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/SEVLW1800906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49391d4088738f913738b03c398a6887c2be86bfc2fee251eda64062e89a644c. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/SEVLW1800907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a54b7f146c0363aa7582ff849547281a6091f4e4b485ecd51359c7473042267. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/SEVLW1800908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa22c0c0f68ab4e256c3ef1e6265f19be4ee842fcf88d708b8670026444fbd3ff. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/SEVLW1800909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53f0a95d1da00f8db17cade5438cb98f9809ec453ddfc98f93c16b9cf23fc3fc. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/SEVLW1800910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7113c874245c3488f8d25b7e76c75908baca8170439a6b5e58632f513d5b270. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/SEVLW1800911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1a2bb7f141ef42ccbf7b91cc31003d72f9dee75393d29506cd020501432339b. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/SEVLW1800912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe566611c4f7e67be587a787dc326a4de1e7bc10b4ace63aafbe5b561d22e5b87. 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/SEVLW2009001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaeb8ee7bdd1b428dee85aa6305f444dd3178ee5b2dcf3edf8b1ec5bed3ad331. 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/SEVLW2010002.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2a3787fec1f150b6107870ab84befaae5fa6261c741eb762a2ac111d2530478. 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/SEVLW2009003.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37f255937b8981ec8321c8126cbec21a0211374eb889e6f465b84b31f82d86df. 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/SEVLW2009004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1063b2f382fa041e81017a9790d6d2bad629952a40c8070e321a9cd66de40ecb. 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/SEVLW2009006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb404564f79b28f3b3f2b7a1516a0f502f092fd72428c7524a82ff00b81236fc1. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/SEVLW2009007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x957a7f6c7f8c44a9b2021793d4e150f0d3e1a54bfc0ae37b0011a7b4cd5c690d. 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/SEVLW2009008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bc191ff295cbe09a785e2aadc1614ba49c6c36f1fdd345b539b42f22121a221. Chain 2 (Bitcoin): anchored in block 958726 (2026-07-19T11:47:20Z), 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/SEVLW2008001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8334ed6aad7651e4678969a8d3a28c2894e672448a633336cca36c91ab12ae3f. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/SEVLW2203003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41da91a0b9dde5c985ece4125b74a286da9a4d409c949cc4fc839c88a80c014b. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/SEVLW2203010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0aab55c6ebfe9258a872e9746e2fd71ee922a4a74b4b6bfaf2ef15c1310b83a9. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/SEVLW2309007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4459914c31a1b9c16ea89e04403d2088785b6b343f7c03e1e671cdf7f0566dca. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/SEVLW2310007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7875e3e44a9f761903017cc5379c0c0889c939794205bb6361cc5bf5d27a5d9. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QM4TX2181772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7875e3e44a9f761903017cc5379c0c0889c939794205bb6361cc5bf5d27a5d9. 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/QM4TX2181772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55a99663fc7c495d0d3729e1198b54bf4f2d7b7ea04c8f49b120bcd45435ca15. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/SEUM72000212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55310e70a84ce6f1392d8118c20022dcdb0e385003d2c60a92147682e287e512. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/US25L2400040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11d2a314ccb3867d0f1d530497f4b0d1d3852b04fc7967b294d8ea6fea3c7731. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/US25L2400043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d8a82d2b86157556b06c27ee150e471477dfe9d3103fbf9d8237048d8c3d509. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/SE4WM1500011.