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 0x9f9717f9f0e7ea31e2e3c3aa07664301c532f7ac5fdc1415a9099000149d1949. 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/d4c6b4c0-6f04-4e8c-9881-d128f77121fb.json and https://artists.proofprofile.net/proofs/artist/d4c6b4c0-6f04-4e8c-9881-d128f77121fb.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 0xbeee6a7d8c59e0a133d6241f068229b056f1847e0908232b33c0d263f314b62d. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/USA2P1949039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x048f3f8f1150d4cb8b16c665b5eff9d6dff73663ff6c3ea4a121551a29ee54b9. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/USA2P2014720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ffbe2c3a6c8522b9aadf1e88250ab920c4ebfa8193788da20e47b61e3c2bbb7. Chain 2 (Bitcoin): anchored in block 958673 (2026-07-19T05:38:28Z), 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/USA2P2014725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c28f36aa0c1b06f781e75dd69b922a90d29dfe948e5725faca3212b9e17c2ee. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/USA2P2014727.
Quantum Entanglement - Purple Shapes Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66b50758d7e9f8ac9985262546927fa220f53c4d8760480f71b0cccef623bdae. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/UKU932230922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6ccb8cc7d71e117e1ed781d2c5eaa1802c37a86c259bf76e7d621def9c29813. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/GBKQU2453390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16a93a2a97d77eb482a4f14c9f33a40ccf0e4b40be6d2d995845d50816e59154. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/USA2P2521481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5851b150cc574096c15e8e58609457cf8d263d42baa15b587fc2487e9d77d875. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/USA2P2521482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaaca0e1236b70563dac797322a1b9b7a9e83e9ec9c405c5c6351b917d01e4ff. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/USA2P2521483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcebd1af578838334879e6c08b7c464f223ad0cd3e2775f26c9ecc32a7517f96d. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/USA2P2521484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08ac650030181a206882f2c82121fc6db9e9f80b6547b9eb2e0d4793cbddb536. 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/UKACT1827065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa9bd005a422c8f9f4da7d0c2422224d1f7e57749412bccd89e1b5f3d5e8e567. 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/UKR6V2073101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6967a8b5bcd0c4005837ca913ee04f0fa4414b1a35b1382e29c85c86469f6934. 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/GBKQU1741890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cd88f1791857ab257344f1a9958d36bf6352b03f5f4b710cfca204da644ebd2. 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/GBKQU1834946.
Bubble Universe (Compiled by Emiel & Giuseppe)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab6352def42ed023fcd7081f524e852fc58ad1248bc41a96318b15f098302613. 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/DKL9A1900009.
Sangoma Sound System II (Compiled by Daksinamurti & Emiel)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12f8c1ef86afd3d9a57dc330e81606c4af1e2a41679e92dc372eef9b0852ba82. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/USA2P1912095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf117dd4403e14bb5c68aaa777b9aa435a8694aad5d07a3409d117b8ca803d548. 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/USA2P1683823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb173b314266d0335e6739993be7d1de17c50199fe1730fd6883436b20918d3ba. 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/USA2P2033190.
Bicycle Diaries - Compiled by Emiel & Daksinamurti
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80535e5ff802dcfa427463ac9c68a7f4aead8dceba0c18bfb1fc6b35cb650360. 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/UKU932300501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61abb3cd6a5dafaa98d238495025d334d801950ee4815c8e4b6e1993c97d9ac5. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/USA2P2116552.
Edge of Time - Ingrained Instincts Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x617c5fa8959d9c3b4712d89bd7cda467acf8a4ee0787f1a9579f8cb35ed9981c. 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/GBKQU1951805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2948f609ab12c6fe92292bc8a213d240760c1519a2a1b1051c74c0ef7bd0a16b. 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/USA2P2424328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7219eaf639f902159860ccf23942ce48de7645dc4be5a6f0b765c64aee0bfcd. 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/GBLV61626516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1d201e20dc2091eb4d7c797f27db41e80edd19965bd158ec2096c2780975d00. 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/USA2P2502598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8eb969e45319f08cf206550fab571a1331fa63a47763bac6db9c789733e1d851. 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/USQY51763938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa39c2ce58a1ab714a20d9b6b79d576b388501f41cc8df2b8b716b013f4912cb9. 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/USA2P1809407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x877f5c4355b0f658f82c4d1258d4b7615fd4f2947c5a03cea0601920e765b3bc. 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/USA2P2333994.