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 0x226d7f99a2b47dc54a8570448add9428cf4aaf7cb84ec095bcf236da1b46d8d5. Chain 2 (Bitcoin): anchored in block 953759 (2026-06-15T08:04:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b764acd5-3dac-4cfe-82aa-a6b905e62d0f.json and https://artists.proofprofile.net/proofs/artist/b764acd5-3dac-4cfe-82aa-a6b905e62d0f.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 0xa3b887ca2460dce97c504a4b02f911be032384fc6b6bf8ad99daa9181ec5ef05. 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/QMFME2348484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef9c09984c98f7a168afb2a248869e7169665c14a5c62be86e9e68b68fc3b0ac. 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/QMFME2348486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1557a7bf957c3c819073bad5e7542f3a60c89c1643f7a676cfd5c22729eda956. 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/QMFME2348489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f27588f28f7077330635ade2ea55fe3848245ed63535f04caec7ef37923dd68. 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/QMFME2348490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26b24a36ff3306082e4e39f68ad9c24456893bf75b6133a7961e22d7efe42cec. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QMFME2348491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2cf265379631f165565d63a03398d4cdb56c56278a590e55bd8f46e8e3b7791. 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/QMFME2348492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7342cb0482d95a88d29c886d99d420023e252ec1d83a2c9b88dbda39a196171. 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/QMFME2348494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x176c3ea88a559d0a0016a42a9df7130c1ed71c5536cad4fff70127e71aa0ed2e. 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/QMFME2141235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60d9824cb4c79427c25f5d1331043676d87030a53b273a80f72e9a5090751b08. 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/QMBZ91949173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3d5799f4941faebea6e03002eb19cda4ff619c604a4c5c207fb3fc3c5aa011c. 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/QMBZ91949174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbbeaffb67284c3d04333e3073443da0b9cf3bd523c160843e903c93820df0bd. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QMFME2141246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6d312e9e308838fbcc14e3c9e33fc9c69743515d6502fbe80121ae590b2b931. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QMFME1981901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc66a1b21c84fd3561b71e5aebaba8f3e32c3049d4fb5291e6faabf7a56bcce79. 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/QMFME1981902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c74df1182ce9c8fc6350de60ca431ac7e1b62e5dab47ce99781698349419d5c. 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/QMFME1981897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x673e42dea732efa592b62b53adc405e99a04f3378bf4a1dc49368f1e134fa43c. 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/QMFME1981900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x937173339278af7e4add80150d7c17857a1aa2fbf1e1066584b54110fc633b7e. 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/QMFME1981895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cdb50f68901f472b73832f05b7c71970062757b3a0545a5a8ef4ba2561c35d7. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QM6N21800431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3184ae85b6de8fcfdcc9dabb01a4970e71ebbdc34b6e8d44ffc1ba4f9c533b5c. 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/QM6N21800432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x414c86efd61edb51ea00d0c5e59844b725ca27ddbb5a5e9fb30c97e84cc42d68. 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/QM6N21800434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23b5c0aff5ae35477dfe37247b428e1376780f4d2b29a970b67d4e04278e01c8. 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/QM6N21800436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x670e23d75cbd0a3d51780a9286ba56ef0457e6f9c32e6ba613de01d230367e50. 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/QM6N21800379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2e7387f14ff92e4cd6379cefab09eabb9a84fc0dae829af291375dae59a54d7. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QM6N21800382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9fdf30458b40ce41245a8728eaac9549e9e10846f3c0b575562d40df8996304. 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/QM6N21800338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f267f6f7ea931b3de31de96e942c345079bd0ea8919bc38c6a8bde44147f881. 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/QM6N21800339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cb1be6bfc5274351d606cfcc1a78e621e2b81a2b2b057ddaefa23fb7aa34f09. 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/QM6MZ2440770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2cf265379631f165565d63a03398d4cdb56c56278a590e55bd8f46e8e3b7791. 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/QMFME2348492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbbeaffb67284c3d04333e3073443da0b9cf3bd523c160843e903c93820df0bd. 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/QMFME2141246.
Artoffact Records Presents: Post-Punk 2021
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x318f5fb366efabea5b960a322522bc4492ca12828db7c7a0e8037978b762348f. 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/QMBZ92032387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d15517be83c2fb538aae3098ec86ecca10aa57bc78c3a491d96af1924e58811. 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/QM4TW2191890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb86a8af0d05afac37fcce19aadaf92641339ab10a432e7a77d442b440cbba952. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QM6P42343219.
Artoffact Records Presents: 2020 Sampler
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf768ecf3900f3ac60218bd58977a9dbd582b66fc28d8500a16052e56460a17cb. 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/QMFME1943169.
Artoffact Records Presents: 2021 Sampler