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 0xa40cfe2a7f8d6ca25ad8e3d061618f696571477dc986be72ac94c89788b39e14. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d06135ef-5d93-471a-8e3f-ea809d7c4e13.json and https://artists.proofprofile.net/proofs/artist/d06135ef-5d93-471a-8e3f-ea809d7c4e13.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
The Great Colour Gobbler - New Music for Brass Band (Demo Tracks 2022-2023)
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 0x2b70342a61c747a9a4a65d732d6883ff657be4aed60679f2706a66a4cd63ccb8. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/NODGN2205010.
The Boatmen's Ballad - Solo for Flugelhorn
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6406629e390e7d791be7961ceafec9d575773c7dba811c9a337b64644285617. 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/NODGN2205030.
I Believe - Duet for Flugelhorn and Euphonium
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5862097e5c3151af15795c886ef7fff4a5da73c6b8bc37307808b4b95fd8777. 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/NODGN2205060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f52d8fb559a6e8981cbb539472f99d5a6260615f75da840ff9bcb185e0280c0. 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/NODGN2205070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99bc8d1393de72706ecbb29e2bfaab713dd3ac48bdccd2e94c51409c3fc52c0c. 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/NODGN2205180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ae0d5c6d55920c7721a19f3f0f2dc7f3dfaebbea6d89dfc7b671a2d9ecd6ded. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/NOCJB2100412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9df548d37b2793bc30109e0d9366dca9ca99d9c48d9b8800436b98f8b35ba110. 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/NODGN2205190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb1ca0a281d56f7d487396a08be3a5e45adba2f11a7cc944b9ae17d1cd09b719. 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/NODGN2205090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bdba68cb56b0855d2ef823cf075972aec1f9e0b57c494fcae86aaae4621d719. 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/NODGN2205100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb615634175a1ed72383a0dadbac25e7b447d8e69a75de49f507e1801039dd8e1. 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/NODGN2205110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11f2fc54dc81a0c3e64c90da1c0552fc67fd24ba2c2ab7b3726f332251c4cd9e. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/NOCJB2100405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf7f8575a589f0bae02d9f73d2b2f08786afa93c8d22361525a4d80c4bb37b73. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/NODGN2205050.
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 0x78eb2af91c01a1f575ba141b48e3b6f0dbdd0c8607b0706b9750932ebc1cd90b. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), 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/NODGN2205200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x891fd21a9512df9375215339a985ff8e384907a0e2a28a500eff11303634edac. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/NODGN2205210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25dcba24abbcfe40151c00001a9e3cff189177e8c844aee6fa4ae7e852dcaa70. 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/NODGN2205290.
Arctic Funk - New Music for Brass Band - Demo Tracks 2020-2021
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf853e5b856492c540494926c441a9bd55c875bddfd559dc81f4030955356157. 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/NODGN2012010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6ba6a514d30ad1e95c9f551f9657764d6197adb39ce4cd80b11745a8b5fbde6. 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/NODGN2012080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca5bbada6ddabc771a9ef51b7acc263bd76ce4001fae1ea1f9d7bd74d4421747. 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/NODGN2012100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16ade79688f3b9df8d551a1fe80c3a854cbd9c5aa5e12f3a58df1d4ccf535b88. 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/NODGN2012110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83e5ab59626d94d62e2611032bbc192fe34941040728055f4aa39207d7a96c9f. 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/NODGN2012130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1856950fca99618215aeb4b6fd32019340b3f2a3cb618eac0832ff2a5af6f1ab. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/NODGN2012020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6341f57e29fd438b650ea5b3e13e2df45693f9ac849493b9588f80ed410991af. 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/NODGN2012040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0cfffd880103cc89ae9558cbdb9807ddc4a53bd125c2e50a3d8a75a0b828d09. Chain 2 (Bitcoin): anchored in block 960288 (2026-07-30T17:41:38Z), 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/NODGN2012050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf130e54389ebb8f70a5e66fa24fba7a302fc18cf3aa7d9f737f3b6243418bc8. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/NODGN2012250.
Berlioz: Requiem (Grande Messe des Morts)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c671164341e4d2ae9e930fb57223bd3538362efe16f1b15802934c1823536bd. 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/NOX9X3498810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacd1cb5ba02f2da050034d2f2efe46b827e7ea7cc364c1ea9f617cff5b4a5715. 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/NOCJB1800116.