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 0x9e82bc83914bd6b4aacceff18d612af6009c264460b827b93ff76bd2dc0cd0b5. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/63239a47-142e-4295-a085-aebbc6b381cd.json and https://artists.proofprofile.net/proofs/artist/63239a47-142e-4295-a085-aebbc6b381cd.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 0x895e6469f2429fb0063e43cd4afb47e9a04f5c5fa87804735d0466ca107cac23. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/UKX992100012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe83d380b036dc87c3e936b16714f6bcb3f9b527b7afc62c8cee403bc65f57f60. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/UKX992400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a63fcd08c83e13ef596a0f1ee373776539fc5839ae9cb7cfa8b95962437fa18. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/US38W2246102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bdb9ddb3a1d2a790a24525d7798a085c0b36d4d41f0cb68146a6ed766c67595. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/US38W2146101.
Blood On My Nikes - live from the Royal Albert Hall
hugo: reimagined (live from the Royal Albert Hall)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6c259226cf339e035441a26e205eb261de729bf3fdf0b1fcc63993f2a1ba15a. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GBUM72401822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4ca96f749a271cc138bda35986820defb0dfe7c3564acc51d8ad08aefae4a8e. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GBUM72203078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x164362a22adee171ac4d4e0d6ab5bf6a1683e1ba00094b7f0253864acd982c9a. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/GBKZV2200172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f5e80bad6d2ce96a3d2c545a254ba47847e6eaf1662ce78171d987bc6020a85. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/GBKZV2200173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x386a875e7c2ae772300e283116f589a866c7672b96b2791f8322679e07856488. Chain 2 (Bitcoin): anchored in block 960268 (2026-07-30T14:53:07Z), 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/GBKZV2200177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85aedcc378d89fccfca81cbb6e002c95f3ef63da514b2fabba68b71d9b28838e. 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/GBKZV2200178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda05ac34298068f0ee05a4273746fbcea209613eca6676a5c4792c4321ff2fdc. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/GBKZV2200181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4884bea18ecc3dfb040ab8dff949f66edd53d3e2c0f184354bef2a00206d0337. 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/GBKZV2200182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98c03081b0990454a181343fb2b6310c86912093ea7613f3befbf5b6f2cf9b03. 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/GBKZV2200185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda05ac34298068f0ee05a4273746fbcea209613eca6676a5c4792c4321ff2fdc. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/GBKZV2200181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f5e80bad6d2ce96a3d2c545a254ba47847e6eaf1662ce78171d987bc6020a85. Chain 2 (Bitcoin): anchored in block 960170 (2026-07-29T23:52:38Z), 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/GBKZV2200173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4be57817a06afeabe361f7e228810552f9247e220a4b97271d4ddd83c424cf6a. 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/GBEXH2100249.