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 0xc058d18af54b2f9de3774a1dfa59fd0b97d1ba8690a4df652286780241654740. 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/38eb8c77-8a7b-4245-8014-c7a90d5a0c5b.json and https://artists.proofprofile.net/proofs/artist/38eb8c77-8a7b-4245-8014-c7a90d5a0c5b.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 0x87ee85f5f5a8adcfc9c70c6d1a573309b9c75bc86bdc07d3219109302593b4c4. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/QZLL92354538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7afe2a0339b8c7f328ddd2b73c97671929de009773c218946e75e85e28e23703. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/QZNB82330517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee2b0180faf7e2eeaafcf5937223c1ea632d15a3ea7c2d0c3bac8396e232046f. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/AUGBT2334626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99e3667a2701f39998d9108a3b6cf877f2ce60b16865e1ece6d08f265bb1236d. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/AUGBT2334632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28dc59a3bf25f65a84be2c903054c56831a13b03ab311c68814158c9b205cdcd. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T20:03:27Z), 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/AUGBT2334637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0750c1e79c336e549b0e62ea431ce4019b49b4d68ee4ee8add862a993d77e62a. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T00:07:05Z), 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/AUMEV2499291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x577618f084ec7f78c611412f79059ec51bbe35f9edc69b8f78207b5f542a8959. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/AUQ9D2402968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1165f8761fa85d38ef21b4bf7974e66a736c60625b597cfc96e1e5a5fbf4ecc. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/AUQ9D2402956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9a850b48f14add5c2bc54ddae36ef7c9daf6ab7025358ded34c7f5852893850. 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/AUGBT2405941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f9226f7e98ed4392a51b557aadb51a5e78c5aa1d476778f913bd766e15bf24e. 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/AUQ9D2402964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1826a5e67aa937c9c325ab9487609623f92088c08f5caa113987f3d3ce0730fb. 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/AUQ9D2402965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80bf8e3dc97ac28ede088c1aab482c3e4f71087326b0340a5c7cd9b9b6e15177. 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/AUMEV2434016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1263e148d5a8dc8692f6c377214ae3086c455e13e06aa1721c97b15edbe41471. 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/AUQ9D2402991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f076c106197a388b9eae2f5806651799b53cb67c0ac3d626746620bf5c694a8. 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/AUQ9D2402997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc78e410d31eb330bf182dfe21a1ac59c6fab37589a37add33a49d3e646d53136. Chain 2 (Bitcoin): anchored in block 958523 (2026-07-18T08:54:12Z), 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/AUQ9D2402967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5109972dba4f4b974c775b9bbaf0ee574d5e4a65262f1f8c453d28f7870e0134. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/AUGBT2461130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1e59ebecf5cd5b25db9b7783e4f0f6e4e31351e3363654c4be2abd53468e9ea. 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/AUGBT2460905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b9647562c7d30303f116a8c38059d15b3ddd04d9a96a9b153c1cce623f39ac0. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/AUGBT2460895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc43b403b5daf25aadae0ed7f0d1e23cf4a512749912ce3332417658aeea16251. 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/AUGBT2461136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe06a9f6fa3cbb1ad764397bdac4366c410da63eec2f4e48aef0fd97f034ad9e3. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/AUGBT2460911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6df13310d2fdef0562d0caae83d45edae0b4626f3a0cdb19581872d7604e4928. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/AUGBT2460916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35d0e17db2c8f9b2fc11678fbba4d5e44ccec330042a87cc8d577048d0945b61. 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/AUGBT2460898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9895f17c49915b953c03835a51489c80e355be75b351e2a57ce78f6d9f81522e. Chain 2 (Bitcoin): anchored in block 960305 (2026-07-30T20:14:59Z), 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/AUGBT2460925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1850ac8bc7e98dd3cc5d8cb34d5522abe51a04ce60cae3fc2ea494392b872092. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/AUGBT2460920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7466bb95a55090684fc31593898bdc20c012bbda9837e3d5c6d9de80cf267771. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/AUGBT2461131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc561427d4d537a24a67f35526726288e0faff3e2689790d0025d01a11a5b254. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/AUGBT2460903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53a253025466ed41f85e421a7c4e834cbcf98e3e95ab7c52456ea87a53208237. 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/AUGBT2460908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d7f0fa5b54f6fe67081e53bc21ec16414d575c7fa924c6f4cabbc9a93c96b26. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/QZNJV2377586.