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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 0x86d755b16f56237fa95e2b7eb5fe0e7fa964a9a130da2e2f9f131b818d1dd669. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ef170104-429c-417d-af07-d60cc74629ff.json and https://artists.proofprofile.net/proofs/artist/ef170104-429c-417d-af07-d60cc74629ff.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 0x04ca7316a40b315b67c5bfe409c92f481533ac0a2e50a35592a63c0f0c6d05a0. Chain 2 (Bitcoin): anchored in block 958095 (2026-07-15T04:30:08Z), 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/GBFYE0300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf8c84c5330e80a7cfcde7b0b6ca0c9abed97204a74039de40fa147f8d803d97. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/GBFYE0300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79e6135622cc5530cb2642fb87ea848c41d28c32257975689ab5acb81ca6747b. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/GBFYE0300011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fbdd08fd777986a39c09dbef7d1c0e4895ff38be74489ec92203d65604fd0d6. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/GBFYE0300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf8c84c5330e80a7cfcde7b0b6ca0c9abed97204a74039de40fa147f8d803d97. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/GBFYE0300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f581fc127952f172e9d6fda0fc9aa8093149ed467e102d03911262557d1b49d. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/GBFYE0300021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79e6135622cc5530cb2642fb87ea848c41d28c32257975689ab5acb81ca6747b. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/GBFYE0300011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c91e1aa9e1c28b33bf5a7d2f17d2e78b2c4f95e2c621b94d0787a273c581b6e. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/GBFYE0300010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb636c2f4260ae350d4ec55134a780f0bf0d0b1c17ad6e0dc72686b84899b8c11. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T11:08:30Z), 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/GBFYE0300013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x372bd406866d67dfac4b0eb08061035cc87373dcfae9f7457b7bb568d85070c1. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/GBFYE0300014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x845e27eefebb11aa2aca9a155506080f1fb283cbc98dd827bf54189485ed49d8. 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/MCA010500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00d3215c684b561d1bfd4a7d44d1fae1b8c4b1d915d711a4d3d3d2cbdd1a1775. Chain 2 (Bitcoin): anchored in block 958086 (2026-07-15T02:55:47Z), 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/MCA010500005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0410f4895546156b47fa0bd0b9cbf36e628722276a492d6b23ed8ae0191ee35. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/MCA010500006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x148b82f55a893af7b9830ec2c5d4e74d1a178b981d311f9d0860bebce78e86b3. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/MCA010500010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4cccaa8f162efbc422a4fd83e5e7d208ae0e3b121116ada4f005523dfda8978. 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/IT0SI2400022.
Nothing Matters - Township Rebellion Remix
Nothing Matters (Township Rebellion Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1d66ac6f7f588007e711df08cc621d51774b53cb6e494efeefe7f6ff7a915e5. 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/GBJAJ2101931.
Nothing Matters - Sultan + Shepard Remix
Nothing Matters (Sultan + Shepard Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bdbeed4a8bc50f98b4ced4099c021ea8bb45ff2ba3864c62b45abf5aba0c06d. 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/GBJAJ2101930.
Nothing Matters - Sultan + Shepard Extended Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c402692b431088b036f4256c3a2dc055eced229be6d2f27bcdf1897d6daa056. 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/GBJAJ2101929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeff2b10cbe4503778c1994d6ed4b4ff09474946c6b80273f496414576e14baa0. 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/UK4MC2400197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeff2b10cbe4503778c1994d6ed4b4ff09474946c6b80273f496414576e14baa0. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/UK4MC2400197.