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 0xde1bb8cf8d81ad41176995240a9df4b674574eabfe22e12d9c9b4e900ec5806d. Chain 2 (Bitcoin): anchored in block 953695 (2026-06-14T21:42:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/726be616-5840-458f-b723-2a1a5b02f088.json and https://artists.proofprofile.net/proofs/artist/726be616-5840-458f-b723-2a1a5b02f088.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 0x2e9b871b239f61c411c998376f44cb0078799998e74dc1581d9b637201f63f98. 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/GBSMU1915131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb969b9194fc332a7fbf0385a85ab8ce4d2ce4f27fd0c781d8c8bb9e5d229f5eb. 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/GBSMU1915133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d2f4ddc2f740667faf73eb9fd20d8916ef4f39646f641349cb51129484ecb0e. 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/GBSMU1915134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae2183446c097c61d9372b5639ed0eeac6533e9f66e67553b77426d7140aa96f. 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/GBSMU1915135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a7ec6cced5d5eed6ec96f62fcb981b3ae8a5d92c99da47d892972c013ffc990. 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/GBSMU1915136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65d96f8920c576f839f00259ef110107fda32b2197c133dd6c8c144f999c97bd. 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/GBSMU1915137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a2ff6f9793d9241528a7b163372dc61451c93df6ecd81d02d77bfba888b9e6f. 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/GBSMU1915138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x768b9c80418384217d455062eccc5bd85c9939c1199ba38019bbc31380936515. 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/GBSMU1915139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c28207251f6edd252a9cd8c44a50fda3336c537525094b434087a41e33e0024. 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/GBSMU1915140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96f25b27a34a969d5ab38a462f0c70d80f04ff7d9ca7b1b3e74ece5c191b8ff2. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/GBSMU1915141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x974537ce145d56f23ae76aa21cf70c80b8b61eb655cabf19fb8e80a68257e1e0. 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/GBSMU1915142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x285f719991abc23d8b37ff07ac9312cd603cca79c3a83e4caa9845b5127c6676. Chain 2 (Bitcoin): anchored in block 960429 (2026-07-31T16:07:24Z), 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/GBSMU1915143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x305298915396b64dbad1da3fd05252c4cef5ca8506fb98a88c271cde94d3263f. 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/GBSMU1915144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd71c393d9950e639c01f3549294d68db1811eb4ca71ebcf2579c13b5fbf8c591. 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/GBSMU1915172.
Adveniat XVI in F sharp Minor -Nocturne-
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22fc0df27c0b5a42e3a674a73c455dac8ac9591ce594d503d1df4e2a6b12d417. 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/GBSMU1915173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee1d9e00f43852bd43d354576d1a93e99d1667698712010bc38c3a305ae7d489. 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/GBSMU1915174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6ccc4c654eb95e207bd88bd65b82fdb8f8dd4aff0b197cb1f4d3f8e3a301836. 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/GBSMU1915176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcde4e3873a76de4cfb63cfcc5e554844ab2d8486fc623923b9ddbd3e06779634. 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/GBSMU1915177.