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 0xebdfd307e3dbd5c9d049b552ef964eec0ff782582f12b7e4ae06194502db0874. Chain 2 (Bitcoin): anchored in block 953762 (2026-06-15T08:21:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ba4dbe02-a2e3-4406-ad21-c0d758502947.json and https://artists.proofprofile.net/proofs/artist/ba4dbe02-a2e3-4406-ad21-c0d758502947.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 0x808c5b203813bf01c8e8c41b79d242bbfdcd9889a64ae20b0a49e01ccdbc5bf6. 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/GBLPF0266490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b309dd4722e314f777e7a33e78b00c599b3c7fab732ff46576cad563a57e113. 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/GBLPF0266491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e9312890f026c154a3b719e562e1d928e5a2d6b7fdefcaf8ab0c49d8ea8d54f. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/GBLPF0266492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdeaae1142768d810e1f8911d0ef7702c45d4e2ab85f8f8d7f0967e5b81418c33. 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/GBLPF0266493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53652e63ef8d4c2fd1078ee48669908f52deac3fa37c637cc43878f621db5a85. 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/GBLPF0266494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66e8c87b01f0c042ef440805c556a6656bc260000145c5046a02f4fd1111078f. 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/GBLPF0266495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7703de0d6563b634c9440d0b1d47910adf33ad774a16a524749a12f68c7d030c. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/GBLPF0266496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa193bd236bb06b293e655bc4d054790764fa6254f00ce6fb6d5154c7fba68fee. 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/GBLPF0266497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfcc1c34be3491a75546163e48b425ad5f6d92525bc1a737d1a82bf161fd01c2. Chain 2 (Bitcoin): anchored in block 959054 (2026-07-21T20:19:31Z), 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/GBLPF6699780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0ee6ef27f6aca94b88d7906c47f663a6bca5e3ea12e342af17bb200a715db3b. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/FR96X2265374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea493f828992ca51611035298e9d41a73b654229ae184ea41df88c2981aec7b7. Chain 2 (Bitcoin): anchored in block 957796 (2026-07-13T03:24:42Z), 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/DGA062291734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83394fddedeb5dc2b666027e6089c455512adc5b767d8ca930577c8801895468. 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/FR2X42369972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8af718e40320b70c2118802f6e6cb89f0a4772bea154297cc8b5a235620973e3. 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/DGA0M2301138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa28201616746f70b1f72fcfe85aa62362ad57bcf0686dda7845deb1b039887c. Chain 2 (Bitcoin): anchored in block 958667 (2026-07-19T05:04:54Z), 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/CBEYJ2400751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4a221c1e7967f85a2b345dd46e9e84ca640abb240bb957f26075b18963e23a4. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/CBF8B2477277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02024f88c7d386ca841627b74f447d8bb7300ea48d9d20e26c4be54cb57f981c. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T16:58:47Z), 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/CACWV2555667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfccf61ab5d239269865ff7cfd3e40060bbd5a079d1ea0f665afa63918b4c8a60. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/CAGOO2561170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x367963dae0bdd0f0d66a510616a9f90f17da07e768e979cf9645b088d28681ef. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZTBD2544135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcff91539750c0318afca266d4da3af3b7226e463716413ab51453ce52f2825d7. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZZ792501140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8537557721c5e66b88f8100b7096832736cc056cf05598803c785c3b81eb7129. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/QZZ7X2597181.