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 0x3f4c183117be8227760f1c5a9f0dbb83af897c9e0dba40f7dfe424869cd4f568. 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/a9310226-9c49-4da0-a7c9-217bc671e044.json and https://artists.proofprofile.net/proofs/artist/a9310226-9c49-4da0-a7c9-217bc671e044.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 0x7e83e707d5ff1071d03cfa8b6e9b4de8c48449a93e9e9c2d8486bda5205cdbfd. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZGWW1966537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a2ade347f26ba700e96f51c3ffb18d8ab214984f5c54c8a10afc5103fd50a7d. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:29:04Z), 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/QZGWW1966539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcfe5fa1c98f4012ad2f2c9c6b1f1b710d4c0b873dd7301acc6a08483edf3cb2. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZGWW1966541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x667e908cc23424aaafa20b5b090824b17a3198ab16673902af358fffb98759de. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T22:01:36Z), 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/QZGWW1966543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54b3bff1d12c3130d63721d965226666fa96f139c3cbdd7e2a0d5a13c9ec8dcf. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T16:07:41Z), 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/QZGWW1966544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28eaed73d30762d492e6c9dd97845ab1cd6dd0e714c20279f86d3fc62d205cca. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZ22B2047528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3beb638bb67ea4e5b3cb0dfd2bff9c070b3889826485247d1a7078cb82c248a8. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/QZ22B2047536.
Schiehallion (Fairy Hill of the Caledonians)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1513f6820f2f53909b2c115fc839a27d0ec3aaca763d5cf6b5e80130c44d19c9. 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/US3DF2248707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fc2c4aaebc1f73bfc7e7beef6a7d75f1b31df7e71e0095eac57345dea62d1a1. 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/CA6QG1000016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0720dbcf46ee7e314a3d3fe39202616a862797f5d36d8d5ae93c7eb112e79447. 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/USHM81762853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a2da825b5a863f0c6537df14e5d78c2de103731a353a90febde27e743911909. 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/US3DF1521466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c46d875e5fe3c534e6f5c4eb87f9d8ebc8c77c21327177d2c84b3eae2d2aa42. 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/GBSMU6107554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c140ef993f40432f87254357f4e411fd8aa033c5d9e1bd56bdfa54568fe9552. 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/QZHN72160675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0359d3f5244c4999cb160143d28a4b35f89d273b7361602d62f8e3c28ed72d88. 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/QMPKX1664882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88e54f050738bc71d4579c6fe474a125db8831deacd554502d7e9a517f85b678. Chain 2 (Bitcoin): anchored in block 960383 (2026-07-31T09:50:37Z), 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/US3DF2248670.
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 0x5f893d86c5bf74a7916a6564bb6691c79a010955ac8b32fa36eb95276a01a9b0. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/US3DF2248680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa30cb8fc5769fcef540eef7b871e02e6c540fe080a7aa3641fd5ecb5991affa0. 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/USHM81762850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e346a263f11b72f39a94187df7423668551648a6c2a1a6a0cdc4a705ee0c058. 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/USHM81762860.