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 0xb9319dc2fab2a64ddcf1257f21ef91edaf27cd406339dae209368cdd4d2ebae4. 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/d5899471-32a0-47cc-b15a-4ca627642058.json and https://artists.proofprofile.net/proofs/artist/d5899471-32a0-47cc-b15a-4ca627642058.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 0xc15adff55a103def91e6c9f98e00578f2ea8529ff09b35bc0b9077acd393ccd0. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/GBKQU1541293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc13e77e6638046061a289a5a2a8af85f50f0b6e4b02ae5c07c68b886f0540721. 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/GBKQU1698186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c27a86c6719bdfb4eee5a8bde5abd7ee6560c305aa1c18a59571bc716486f33. 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/GBLV61633919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05021c18ea844501d2f98f1d73ce0ce5994ac7c4559e0d02f3b6e98b0fa2a0c3. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/GBSMU5205671.
Voices (feat. Bryan Ellis) [Joshua Francois Remix]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d5833c5a4da1779a273fd577124c18e5dc1cf59df6838e24100cc5d2bb79607. 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/GBKQU1892852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x248655256f02398bb14d1a4e3b44f0bd8d55318c2694237d87f8a2976bbdda3b. 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/QMDA62409776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf3fb427cb4309fde1a937cdf7b8e75e792c123fa04e956f32e4d78edba620b4. Chain 2 (Bitcoin): anchored in block 958830 (2026-07-20T05:30:12Z), 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/QT4K32528671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17a10a4fe255794fc3647c55a54277c557d6251495e4196e59b00da5c8497310. 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/USQX91701611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11221141c8d5414a8fc0285cf8e4ebe95d39299e00d5c27ef8d78cbc3dfd7ea8. 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/USRC11703363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2330da8684fb3f15ddb146bc7b7a78dcc17c213b6b8db57f9c7d30b01c04ce6. 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/NLF711606535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7526148c847c0419b68ff6346dbc3419a97c6a9091f2d5396e244e77183d7db. 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/USAT21802755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a0c9a9d8d23c579d094504e25c089ecba1daa4719d8b7582ce9017f2d5a1ed0. 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/NLF711608127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8574083c8086ee4df17a7259106bf4c068fd0951d500f27625c036cec2ac45f. 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/NLF711708929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeac9ec27dc5cdaee0d4d6350d24d93751236130c4d938c2a9bdc75a30b113f83. 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/NLF711703627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a0c9a9d8d23c579d094504e25c089ecba1daa4719d8b7582ce9017f2d5a1ed0. 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/NLF711608127.