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 0xd48885158fbcfd74b8e1df00e6e9eefde12576bbb85cb0781ef0cbb9092263cf. Chain 2 (Bitcoin): anchored in block 953687 (2026-06-14T20:19:15Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6856ec5f-1604-4c5b-8df4-04ff245b0d1f.json and https://artists.proofprofile.net/proofs/artist/6856ec5f-1604-4c5b-8df4-04ff245b0d1f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Sondheim Unplugged (The NYC Sessions), Vol. 3
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 0xd9860f4e9ec26ea153da322ecc6a8002d7107862aee960afbc6754d9234873e8. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/TCAGK2281638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd26c0a068696539918f79ec93b3a9a15b98157c203b286c6fdcaffdfa3cde165. 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/TCAGK2281660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2c800a720e508cff89407fa3d019e489966df0ca4d8b2c4184f260588cf8b7d. 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/TCAGK2296084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e4c036a175a7662f062a2885f57df824dfc9e5fb61a2148e3ca5df03f61ad30. 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/QMAAK2409483.
Pick up My Pieces: Gabrielle Stravelli Sings Willie Nelson
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcec747dbe3cc46f62925767357a57fcff33ba8160de8a649af17ddf782a62c3. 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/TCACU1604357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4e0d0d673a6e7259b33414d70b066de43a3a35195950eedf7729d7e2e06c18a. Chain 2 (Bitcoin): anchored in block 960231 (2026-07-30T08:33:28Z), 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/TCACU1604361.
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 0x6dde7e6cbc63d3951ebcea8da632f0961e61a5a25dc03de65f5bbc67b5dcae5c. 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/TCACU1604365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a8b275dd385ef1a0efbaf94b4297889945397f82ecdf67216f5ef051108560a. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TCACI1569531.
Sondheim Unplugged (The NYC Sessions), Vol. 1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe17cc8f92d3e376f8c0ac11718246e12e814207bdaba91273e6a3bfe21d930b1. 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/US6W62119753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7355ce3cb60723fd9c97633cc004c5f345b5f7dbd3c33b02b6d0deb9ea69ddf. 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/US6W62119757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57efaec5a199b7d38353f6960cafcf51fc66f64ccdc0bef92772633bce497e03. 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/US6W62119759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2df90bcd9284db2af94aba9321381dc724443e99ff2b001c82117500ff94cbce. 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/US6W62119760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71963f8072076439fda07bd231c75663d0182a7c0d977a9a676ec8c2f0944f40. 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/US6W62119763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f217787c5c49ef349e2be6900d52af55579683fe8cffb91eee601e2ecb82384. 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/US6W62119770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x396ede8b9936fb071987d05004b4d3359ea6f4707ab1e36055f5d67390f46def. 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/US6W62119778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fe8ba15ebd347a9289671b9af50934654f997afbb4b140a376dbd616b4fdf66. 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/US6W62119792.
Sondheim Unplugged (The NYC Sessions), Vol. 2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab55fff0179f4ec3616d8b051fd11c81d8aa3442479cbe710c93e45425a7b4cf. 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/US6W62119793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x467bd5f2cc0270ee536e60e4cde477fe85cd317e6e020d98cd290b2df7d35478. 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/US6W62119794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x893bd21fd08c96b69e92f66abe616673089e9124bd477f3b534185aa0c9a9034. 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/US6W62119801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x831e334925e9806889ce3e36f8f703c3b301fbeedc80153fd73b728eea7715bc. 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/US6W62119805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x091708bf832cffd4e11a0b84d8f2d5c75fa71145d78e7d5247d5c3744450c4fa. 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/US6W62119808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc12e7d66a29b98c9f1cda56d3b5892843f5c3b511965ed9d7ad03f3d24f6f03. 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/US6W62119810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99b22982b75b6a1085089eb0f1e15b41ec3a24d9e15e307807dbd4001144356e. 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/US6W62119815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab267dd873434aca6ad7cf767db2396d7db5dedfb8fc5ca13efdd0dd43a8d48d. 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/US6W62119834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x326790c8fa70362c4ef8106d9cce0e6dfa916ec614105c4c1fbd50d4f35e4b94. 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/US6W62119835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38d81ea8939183622da5153a21b38a2fc4ec4d658af2534c2132a43759c7bb7a. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/USA2P2445581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ee62af2a998ad9518439311c1067fee4113bd93b1995384bb2532dc59dea6ab. 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/USA2P2445584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a220a7d55620a16d0dc6e420bcb49497a18ba65dcbac560d8bfcd7fd9b5de37. 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/USA2P2445587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0cba2c1583e92924b1481e78741f005a4c4904425815ba1e99ad2f4464bce97. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/USA2P2445582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4ed909053b7d903b9e7f1405fe07458a28fa43f41065069851df7e8b98a187d. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/USA2P2445586.