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 0xf2fb61d8e2f04af6d03e99126d41cd9d222dec91385e1971dd998dd5b1389f80. 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/94ba2eb4-e38e-496f-9c68-d177c72b0c4a.json and https://artists.proofprofile.net/proofs/artist/94ba2eb4-e38e-496f-9c68-d177c72b0c4a.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 0x94dddea22063a5cb55cb1792e1efd07e44f386d67f4cf9fbf61d207451167368. 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/TCACD1507053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1966c2bc91f568e694c900ea2db505ceff6cf99de559868162c648589fa635b. 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/GBMA21873260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x268d8966ad46a80b25bcba53c62efbd3a0bd8efd74044f1720ef3b5923acb514. 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/TCACD1507041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7e5e66feb5a87d67e6b17cffa2a64b7c5a6f432c1e453504905c6075c9eb03c. 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/UKGDC1800010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9823c283c77a43532c9cbb06b160b5b099e346bbbc1a1e454d7294754f2d582. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/UKGDC1800006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde201fd55273f1626b57334a2b29e13f1d6ca50093c60c572b562bf6fc10b856. 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/UKGDC1800008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31a2e25e00d5f7149bcbef983aefac02306d762515a0803e33b4504e07686ce8. 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/UKGDC1800003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac5b4add9029feb77f3f35b7a7b541345b514ef30c3af3d1bebe796de0e393db. 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/TCADA1748708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c2a2f24cb2a87055615c99c285839d632c90cb5751f8168256b841f5a0b53e1. 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/TCADR1830639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5254db4e8bef9ce89dc390374ce6a305bfdbab21b5a72b0a97cb8059b471e4e7. 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/UKGDC1700006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa48532336ca8436d3029338d3d7ba5804c9083dd4058235b0f4aef0c95bcbc85. 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/UKGDC1700008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bbf3917e9142443449ba0ef93c4d51a66676bc03975876724e69cc2985543dd. 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/UKGDC1700003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcec7f947e50c95cb824bef4955388da4cde1a59f5efd20054ea590cad46b9422. 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/UKGDC1700011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc42cfbc04edf7703b09c6a6d97afe3eff26cf2bb847cdf06f550ced72a2473c7. 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/UKGDC1700012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e81cb58860273ae308498f1d3c5b966639373192244dc68063a99e147cec589. 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/UKGDC1700013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x398ba2464d520bbd8a4c9a972c91a9a0376182cb500343eb0ba4533f211c9cc7. 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/UKGDC1700014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x723fd4171887215b51b41f305a2abdc6ea0c06cea8a199e3a6a04bfe88ddb700. 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/UKGDC1700016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46e11ebf2af373dac9e2262f094ccb788f1e98104bd495cd8f5b59a7429b4b26. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:32:41Z), 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/UKGDC1800011.
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 0x800c9cd5440ad690d99e22577693e9e6a259fd9bc312eddcbec205207461ebb4. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T14:48:39Z), 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/UKGDC1800009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44ec1e782ab24abc230446c181438809db16de46d7b942e14b371eaadd77992e. 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/TCADH1724160.