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 0x2943fda542f2465a9bc470a85d0e66f077128db7cacacc519230987b0a38f048. 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/9fa2a2a3-bdac-48de-9863-91d54305f5cf.json and https://artists.proofprofile.net/proofs/artist/9fa2a2a3-bdac-48de-9863-91d54305f5cf.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 0xd9309942cbf0e09307623deb74e5e89a27a1a1112601ef033ce90cd05540f865. 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/GBKQU2393095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a18acfbb8571c46bf4691207e65c2b2a56fd8a3b430da50d37505c2f8026db3. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/GBKQU2393093.
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 0xbe565048c3832bc8e89fb041055af77b9ec2fa1810d41e5656bdbd5a2d299d38. 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/CA7IL2200692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59c33dab269f16149f3404ef05a04af78970346935bb441e6ad054f0aacb988c. 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/TCAGN2268668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fb627ffee97bc7ef62835840a8168d7390724308257dcb8aec1aeb5263076d2. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/CA7IL2200693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31b98bb23edfa535eb5f63aab9445ad39a6ea45857c8a8e6168e3bb3df97054b. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/CA7IL2200694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58932ec2d208b01443217530ae43ab4964e7a751560b9bc78b6e8430fe9bbeae. 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/GBKQU2299491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2492adac20b723f9a4d7105f81685655527c36aba1df2671c76eb23686bcb91. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/GBKQU2299493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x990707f4260429c32251c4a73c88583aa921ebfe590fd8858aecf4a39c3715b2. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/GBKQU2299490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55acc27500eb0bdfdb86185f3855d56e8384fff47d0944e316117889e266dd17. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/GBKQU2299492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18584e9abc6eb4d3c926b650faaa72d9abc08cd8071029614664ce9b6779f00a. 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/QZDFP2028725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaca41a7191c19c4ad09923eb1e7b9048f72de366a51ea19e94e6511371f599b4. 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/UKACT2131486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b44fb90db6a4d556dd967c0df0aaea3779bfe2325a2602a0127f1f773fffe97. 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/GBLV62022160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2b595876dac9fc8865aa793ed4ceafdad56f3dae62c8e8608f8cb4b47ecc0b3. 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/GBKQU2034556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6856f62fc013bdc491f8193f2c348a76e1ea219dad63a4ab7752c69b7abef264. 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/GBKQU2004986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4e30d5d5f118c4c714811c41d5394691631ecd9c0670c7527767fcccccf1b7c. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/GBKQU2004988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d0ff04381823b9fe97b9a42698749865634d59e37d3910299b7b8a6466df89f. 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/GBENT1654587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f4cdb4dd25297b65fc5241a9f7635585966d2709530ef7fc67d6e5dbc28aea8. 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/GBKQU1920905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87343abd7f0b7717973e22d58e71c04aa13e9749438bd091f550860e856cc2f5. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/GBKQU1920904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x028ce2fd38980e1c36d68ecffdec18fc8c372c25e67bcac19463c9c90b8c4bb3. Chain 2 (Bitcoin): anchored in block 960161 (2026-07-29T22:51:26Z), 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/GBKQU1920906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ac3921e2dbca08a3debb0729209dcbfd4319fdcc97afa5111427e6d24bddadc. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/GBKQU1920907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb206bbb601717791a825c93c33618f23f17bf36f6c1d90fe90449facf648914. 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/GBKQU1912261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7d961883de49280926728f344a26993e8827bf8811dd621d0e5f3673b16e822. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/GBKQU1912260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf03ce16fa8ee71a50191274ff3889b6d5fd4f5eeecf5f9510e61e4f08469d59. 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/GBLV61817100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x097f694b9fbf9f5b032f6c9dbef4dfe07150860cf93ed1aface4ffccec37b226. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/GBLV61817101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa80de51df28cb237934291255bcb28b6a1ac70e793514854f181e85305995872. 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/GBKQU1899840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1029eab309afc0c3f857b71e5ec193d279f2865cf9e023df167f5338a12e853b. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/GBKQU1899841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaccc67524a08385ed7c40845af15449c81eb23ab79fc060e49a3a66e7e13bce2. 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/UKACT1863013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x352d5e8b6d88913e76923fafeaa2d6bd3955f392aac5fa40e4549f49d4712276. 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/UKACT1863014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d6cacd031591f3ee3e725921f3773b600b31ea92ce317301e1895ab0c35fc3e. 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/UKACT1863016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4079d5026ba2e1c964d90e234bde696fb770714b5d05c57522202134d3fcf5a5. Chain 2 (Bitcoin): anchored in block 960407 (2026-07-31T13:26:30Z), 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/UKACT1863015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ab4dd6ac389babc4ca1e6ddac80340465c829cf6bc2d38cf6c76d1c849d0784. 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/GBLV61622059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0f4eede9a8f4a836413aa904b670f3624b7e6dfee51d627babae2d141ab9cf0. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/GBLV61622058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e67629d2c53ed79848eef93f8a6990e2a0f015cc7aef7a8fc517d297f43806f. 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/GBKQU1668582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e4c169dbdcd87bce50ec07c010ddd046c2a5e51bdfb33ebfd623c68c5ab0c37. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GBKQU1668583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x407e72eb018bf9e71fd9ba2a290b5f23a2b4e92c1e12f849c67b8bf04f0dcbaf. 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/QM4TX1548012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e91a6131f51a9139906ca36b45463303ec2d635b372f9ba726f931c6f4d0b74. 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/QM4TX1548015.