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 0xa3d5dbd79ddb233e1cc7aaaf02429b8e0be45a0c3e41888f4772319e6ae297c5. 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/17feee49-81b1-42b5-bf35-6098e1065f57.json and https://artists.proofprofile.net/proofs/artist/17feee49-81b1-42b5-bf35-6098e1065f57.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 0x4f0f5cf36ebfbfd86d85d7e58f3f56788a37b30aeada59f34d7d6ae536604c1f. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-21T22:00:50Z), 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/USECL0500611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x974f867778ec7d4548e6aac0990da6786028ef1c003720c4f5f5752b122d0dd5. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/CNA651300955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4682fc683203aa83d9e3efda6586969af515e641dfead8197b688ad636968e1b. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/GBDTM0801105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02b2ade081a718a72cffaf213ad0baf218aa81a8182643e6cc71925e6e46aa80. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/GBDTM0801109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff011b03591b093f2575b5dcae2aa673429fb7596f239a5509782e4c895bb92e. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/HKC372458743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x167138ca53fbef8683eedfc9419fcca6aea4e5080b847952913c30b89d077523. 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/NLD751000035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02b2ade081a718a72cffaf213ad0baf218aa81a8182643e6cc71925e6e46aa80. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/GBDTM0801109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32dc87be8dd7be797efe80a37fa495f34b5f57653777d2acd22a040f56295ed6. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/CNA651200532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90433718f188b71a8fb02088ce6adfe057152d1ad8bc75d0a5f050472e7f5a38. Chain 2 (Bitcoin): anchored in block 959026 (2026-07-21T15:38:13Z), 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/GBKPL1516968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8e9de801446a857ac1a2ff06f6b528379133717bd654afdf0c37f424e8e9fbc. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/GBKPL1516974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd6066d1042a38d4e284b21da44ca8d5e486a7ffd9d7f0b85dd5c557e43c2371. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/CNA651400091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x101cd09987f8bf047fd7fe2ddd0c8e4d31e92f6d720f819c6f89144e3b3e63db. 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/CNA651400095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x730da31564eb18a023fa331a749695da27c7e291741a8573b316f25a632914ee. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/CNA651400097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4159ae8e2f0fdfc933850a969b38fd9b53370cf5292518f57f39454c8a812de. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/FR2X41619997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96894d0914d5a59137974988b629aa5d0ecb23ab36fecf275e115e30b62de10f. 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/HKC381600010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c1b9f62fcb16f93e245e6ea6da7b567cc844b079b83d43b580bfd08f1d562dc. 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/HKG732145497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x054455a0694c122fd508158452ba73da2f89b3353061904babc329f51956d3e1. 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/QNSM12400378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d087c05106149cde83d50d08146c48e7877a94a74ae93240786f38cc8d3f7cf. 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/CNZ632401406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe49213f30d4e9ae50a00c0a205ed17fdfdb8ca9c31a21226f29a0e9455c8fd66. 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/CNZ632401417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa97778cd87a0730abdcdf3f459ce9be786907b909c166638c8cb5a16574b6314. 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/CNZ632401075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b1ae47b1fb17867a4fbf259c55f024ff602a4092cab0663069687e9069ed08a. 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/CNZ632401081.
El revulsiu (feat. Hanggai & Turttle Island)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d6bb59d893307c5b15148a8321c022e634d677c4b8ae3c8da03799026699340. 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/ES5151500757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d6bb59d893307c5b15148a8321c022e634d677c4b8ae3c8da03799026699340. 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/ES5151500757.