thumb|The Faroese folk metal band Týr performing in Copenhagen in 2007. Their development of a Viking-Faroese brand has been interpreted as self-exoticisation that capitalises on international enthusi
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 0x8b079cd1c7d538a7d3d42f18a0d80e35369e4bc981f00eea2f703f3848e1887d. Chain 2 (Bitcoin): anchored in block 953605 (2026-06-14T07:39:50Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/11287197-2d7c-4feb-812b-e80c277a340f.json and https://artists.proofprofile.net/proofs/artist/11287197-2d7c-4feb-812b-e80c277a340f.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 0x86d616e2504b1798f2ba3c14f9cb53aa9df8dcae2839d55da9bd3596910f9ae8. 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/QM42K1707617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07cd7bff32a71ce528a58ae22add6ef9f5e29f7f83d867c572ae6e2773bf4e77. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T15:07:00Z), 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/QM42K1750048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3571df8c4b3c810c67992b9cff89c6adb36e9442c54c1de23f782c450c85b9f. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QM42K1716640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc5c36fe3a904512fa232c7214c4efc723f9196876d4924a82ca1009467ad6cc. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/QM42K1791076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1eefbe282d0fa207c10d3e079118d10bb79274bf173224877c714ee8faaa48f. 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/QM24S1804511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a64719fea0dcee90d2dd6d0428ec547ab79ef0ed21df7d7de6d30756ce81c39. 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/QM24S1820723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x862ef96883a03e1904c6ed44421c62de1718bb9fd4f50d13228fba19589c77eb. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/QM42K1763445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3692e2df34cbfdb22334dee8b52f2651fd35040a82f099cb08d9a290481fb244. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/QM24S1828665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f576e9c165af9b607b80cec205f4c61889c8b05f524c77e446830ec4af263da. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/QM24S1840941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13d2c6f541353313388287fb86edaa7fac9e2e93e5cb6b3ca124820c538f7663. 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/QM42K1773326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d27954a20d9b58e341e4acc4821519e6571cbdbe05d2bf8299aa60048c00923. 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/QM42K1963657.