thumb|300px|Fenrir and Naglfar on the Tullstorp Runestone. The inscription mentions the name Ulfr ("wolf"), and the name Kleppir/Glippir. The last name is not fully understood, but may have represente
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 0x0bb9cda04ac80eea56f540d9fa8a86471b75ac8554e3bbbbe02c7a693bbfd2d8. Chain 2 (Bitcoin): anchored in block 953612 (2026-06-14T08:22:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/16a56e00-4883-4f4e-8701-63fafc00c58f.json and https://artists.proofprofile.net/proofs/artist/16a56e00-4883-4f4e-8701-63fafc00c58f.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 0xe4801970b1063c8f3cc6318df40b6e5b571dc11d71d4b410a8b03affcdc91fb6. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-16T21:55:37Z), 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/QZFZ32022983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66607dbb48070c3c41a0e2d8654ef97c4a88fe2b33bb0016bd584d5721a4888a. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZES92059429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2c59a13126fccad001c9705b735388cbf8dfa7a70c6982b4f3e154068c30e83. 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/QZMEQ2105928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0775c7cb455f405b416654b10b50aae48004e3126e44475abde3b40e11cb8387. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T21:05:52Z), 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/QZFZ62372655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5f829a5fb39a966fe351b0da09750e834ffde751cbfc4559469f00f86704a47. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/QZTB62566578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c78ada2bbaae24fca5769d87a4899615f061f15723cc941143d7ad01c817a9f. 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/QZDA62329385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda023e0b4da347c83f40522906c41efb7beb315a86b4fc1b0a23d9a5d72bb083. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/QZMEM2086129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb4ea9ac7dda3ca8385556a5d84c8a171fe549418acfad43255c699b97b74a3c. 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/QZTAU2124879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e6fd1a26cbce9a5bcd9540007a3f3897925b0f8f3eae807445a1ff4772a2bc0. 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/QZFYX2252098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x978fd875d3ded401c3434d9d96f1abe38896673445ad896db8bc0c0f9420d975. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/QZTAU2126355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68c461ed937b63462df7ead807589202a6cff0ba85583a3b54181ac2b9220fba. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/QZFYX2252099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f036c01b9dfae3b7522dd46d5cf6645af8152bcdfb6629af897d6b66c419b60. 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/QZTAU2126356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f036c01b9dfae3b7522dd46d5cf6645af8152bcdfb6629af897d6b66c419b60. 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/QZTAU2126356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x978fd875d3ded401c3434d9d96f1abe38896673445ad896db8bc0c0f9420d975. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/QZTAU2126355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb4ea9ac7dda3ca8385556a5d84c8a171fe549418acfad43255c699b97b74a3c. 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/QZTAU2124879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ceffb0de2093f0d40074e5896ab72c07a36636fae2094709e0046d44b792143. 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/QZDA42439347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96f79eb31003c8cf98210bbdd483835eb885c0336c76dfc3aacc47a17dfd252f. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZNWS2443145.