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 0x544ad072f2414ac0af6c939fd7bb9cc90d3b6cae49ec170e0c0176ff10fb4ea3. 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/a9faa5a4-4aa4-42b3-a7e5-6d06ec1235a0.json and https://artists.proofprofile.net/proofs/artist/a9faa5a4-4aa4-42b3-a7e5-6d06ec1235a0.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d3b91c8faf66666223a8446eb27f1c5544a9704c34728b083d066b537ca9ee0. Chain 2 (Bitcoin): anchored in block 956425 (2026-07-17T08:48:05Z), 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/GBBZV8306695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5f748fae2938c215e4027a5b9a888903685e2f340deed375f7e92e8606837c5. Chain 2 (Bitcoin): anchored in block 956426 (2026-07-03T01:37:49Z), 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/GBBZV8308631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6153ef1047017716b8c20f7f2eb6e48dff3cd0d85ab4fc98c8977de5e569f4b. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/GBBZV8310567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x444207958e2053206d6cce178c5e571cd8cc064f80a0db45ff0d3e3fdf6ff07c. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/GBBZV8314439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3414871705cd4a8401d9a92df67d1c3103e1bb79e875115cb805759d7d7ca0d1. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:53:44Z), 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/GBBZV8318311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2825a3c08232083be8bf6feef764cf4c383e4d8aeb29a37d7fb7989a9bac85b0. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/GBBZV8320247.
U Roy & Josey Wales: The Teacher Meets the Student
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bea808be13e70daf08afe344af3c76dafb06eac15a49885c8922459720f18cc. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T02:08:28Z), 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/UKU6H1954980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b2e5a60d2a03c7c2bc5820473e0fdc5c5e2ade841925db47dae2970723cc50b. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T00:35:28Z), 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/QM6XS2412705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01bc6ed4f18840719bfd6cd8ae0ab2751f8aec900eebdacaf541352dde54b870. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/QM6XS2412700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5c6f768dd5fe33ce690e5cdee9552ba02b416b5011ffd69ced883f8209da4cd. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/QM6XS2412709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f1edc57f8270b20d0532c87ee5e6f3870e2e5878a0f9b74e7924b4bc9902c34. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QM6XS2412707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2230736b6b3a74ce239dfaf1bf67469b916be95b277f19d0e4fd2f2d74637de. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/QM6XS2412708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79f17df05e6e13329e2ce9f495f6ec5d8fe169ca8dfdc7ac49957dadd14b6d9e. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:40:43Z), 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/QZWFJ2544130.
The Voices Of Sweet Jamaica - All Star Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65bd780ec765d728ca9116a73c9b663b2b981d32a4922da975cbb435008c8024. 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/QMYHM1200024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x609295fed1b2174fdc0b99b2799760eb87b8d7067f9a093a6e6d52a829f9ef93. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USVPR0107232.
Reggae Anthology: Henry "Junjo" Lawes - Volcano Eruption
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf309e801f0a01ff560ed9a513d3014342900857ede03fbc4619397b3941f9c1. 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/USVPR0916293.
George Phang: Power House Selector's Choice Vol. 4
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x298fe648274012de0bd2da88d3674268039b4e365e38ea4568b09ffdd7ecca79. 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/USVPR0814423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f56b69cefaba949f06709a168cb797b922fb30291d9975ada4e19a46fc7dac0. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:19:51Z), 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/QZTAT2488402.
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 0x8262e478fee4afe326bec4f59592350f1efecbef2810f3c9e7184578cce50d76. 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/USVPR0916305.
Reggae Anthology: King Jammy's Roots, Reality and Sleng Teng
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdf5fcb5094f5435fc4d8310ba59264982cea736a2660a381b0fcb5f9b84b238. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/USVPR0613025.