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 0x7c874c7a89d6aeca1f58b0ae328c93dcc7025aaadaa923329f655d574f564993. Chain 2 (Bitcoin): anchored in block 953803 (2026-06-15T15:41:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e2e70040-759a-485c-a223-eb2a4dc31d8b.json and https://artists.proofprofile.net/proofs/artist/e2e70040-759a-485c-a223-eb2a4dc31d8b.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 0x86a0e44aca3232848f9e70d9b7258a68fef0fda38a58999a1d2602a779685151. 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/USA370576416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8126020160ebe6309838905f034f304b45c9ff95b9b67bb02b8eac86f4cb1218. 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/USA370576417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a22e50060e67062929a591a26fa59df2e07a1dff9cb7fb18d8ed7b81cbc9039. 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/USA370576418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30724379dc60f8e8d9d73f510e6fdcac57f626b830296fefbddbc7613d69671b. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/USA370576419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7d912265f7bb601a95d3f1fa7235309cebca72efd437b133e9619b306f65052. 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/USA370576420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73cf2ad4a964e17a6a8ce375b7e2c38d2409a5bfa56d50c4bac805205e7e050e. 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/USA370576421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0086908f729b073e14b02a3ce9954a7d26ead514cb3d1a040d5c1709c3364da3. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/USA370576422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf39d620ff3ef13db721ee5df5f4ccb33b9df454a7683c699f2815d6201937e79. 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/USA370576423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dd6482bb3fd9197d27c9ff0fba43ecbb295cb221506ca27888cec50ac49b9eb. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/USA370576424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4aa606914a70d779439ba30319a7b3b612e38b5db88ea9d58080cfe1929d88a. Chain 2 (Bitcoin): anchored in block 960177 (2026-07-30T00:21:01Z), 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/USA370576425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x911901bb1df78fa2ae6eef21f638a8a0def1cc8402d5f06420c212217d9095ce. 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/USA370576426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82e87656d75f9d247ad9530bae240a9c76dce7d858ee7d0264c91d59494f0dc6. 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/USA370530576.
Medley: The Heather, She Grows / Island Spinning Song
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f2a7701074fb10df026151d68a15dac3957a3e7f69082f9998106ae480ba6b7. 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/USA370530577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x568f2564fd72c5dbf27ae36337fe576765d3624f865287ddde3c1b59d9a12f1f. 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/USA370530578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe91a23a825953f382ce0b2abcc63c17cdb20576676b878c8301e5e88219868f6. 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/USA370530579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8a2042d3baae70943743ffc72729b76a0fd049542bb86dc3299a05790554021. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/USA370530580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc30400d49a069d2e0b9030ca3ca5104bdb8e39920c86bd641ed49cdf6f59de6. 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/USA370530582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39f2ca202a67b0a93eefb48e3715c031f1b928c16ea4d139af2b6c5eaae9be19. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/USA370530583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb802f153e71ed4f1875cb44432877bff36ff208050d86d080b02c6c036ed6010. 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/USA370530584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf84253e5d4d041128496d746c4ece477d14468effa54d8bd777eb20382d019ce. 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/USA370530585.