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 0x942361ca5ef2929146fa818c93eb46142075803dcfbcda88af8361c7816af602. Chain 2 (Bitcoin): anchored in block 953808 (2026-06-15T16:45:15Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ee485b75-5153-425d-be5c-deea793072d1.json and https://artists.proofprofile.net/proofs/artist/ee485b75-5153-425d-be5c-deea793072d1.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 0xa88fb9dc0a9ab1295152ea7d220193a61e68f676f2ebdb24af704d61b997a669. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QMCE71301704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcccca2430800dd70843497acf45c3a9517cdb4c3e60eafaab78f7d6e4222e67. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QMCE71301707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda490a772feec54f16c206ddb6408b10e324ec67a2e73027b67cf8815dab46a5. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QMCE71301708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb902399c00121f69d4ce4c9b7bd9401df406bbd438ab9774eafd4baf1064eab. 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/QMCE71301709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x764e21c1d248a4b551d94958d47178616e0951de8316ca2ef8ee922166dd94bb. 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/QMCE71301712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc55892cefac7867b0b5976ed3bc981967330d9ae4d2813940b5dcde999243cd8. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QMCE71301714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa690a902b6f79438601d769f4d52c0513b1b03d6cb57a379905a9b42c83a5d73. 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/QMCE71301716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba74e218c0f4044e8d60036ab7afc5d615001499e807e4f5158519af4e0a7d82. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QMCE71301720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96c0c6447afd807d942243205e3d628e7fb8ad92108d52346f88d63d754d766d. 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/QMCE71301981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54a0b7de75661693bda430aac81847eabe24d867ae201afad033ee1e4f42612f. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-17T00:06:34Z), 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/QMCE71301982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0db85391eaf8b883a4c1437b9a4da92b3d2798f88f478742f820af0164da3f7e. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QMCE71301984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e9d2436f61ce510d76af069d469ffbf6b857e9e35d511a58fed5cb7af7134cf. 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/QMCE71301986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09afcada88f4ab521adaba0dda3f043627f63c94d3535ffb88f77c5360d52d55. 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/QMCE71301988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef620ccf9d0bf6f1d273bb0743b19d413a140d0524a694af7d254a19d5a55f7c. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T19:33:14Z), 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/QMCE71301983.
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 0x67618191744a8cda963c56eedb222437c5c2a0f3d5572afec5a33a90c1af7fda. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QMCE71301985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b9b9b6a1046e962b4c606a338bd22d31a60a85587ec183116f200f34aed7a80. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/QMCE71301987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3b74b2ac30da7b75065a039798a60010f93633e8dd2989d1cd387639ddf9a0d. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/US2Y71623913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6b3b388ff2942bc6a70921e6948c054fa15caa3f929b9c1a90544ccd97974a3. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/US6R21457065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x443c70e4737bdeec7c82d51891656a837bd19adf961ed502e87dd6768bd24a37. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/US6R21457068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd50b99fdbfced1a3c2d7d34b07935189cfa32fb526ce094aa40e449a1cb2df7f. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/US6R21457070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd98b3a63efd860c272c7e313968265f10cb7d22f4f516f8e74bec087fd40356f. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/US6R21457071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b3917971d0555b49b77be4a344c22c2bc9c544869bc78d4602edd479db893c8. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/US6R21457066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ebacbf742159aa20708b54d262b65e04ef3c087308f5fe37ac530911b861118. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/US6R21457067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1feb5a65643a8e9085f4c4e40ed4a851c829fd0416e6208ab0659b2821b7ebd. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/US6R21457069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a80cb92f3f5f9c462771f9e3dec8ba306eb2f5aa4b34420aff11311f91d7cb6. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/US6R21457072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf03b37011508d8db9aee5d129ee6a594818ee5d95c4cad73b51d67b859a4042. 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/USQY51420980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc934c8223b7eb9fc99869206a09ec30cf95abd4150c09141e56e6240d03f0f90. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USQY51420982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5caed3fe3e78d52126594f154a054dafde6b9112d74b080eb0adcc67394bec12. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/USQY51420978.