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 0x990423f8362a3bd5d4d68533800ee1ef036d2cb4a3646d13dd4215fe3d119f77. 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/b71150f0-b18d-44b6-b2bc-72efc5c2aab3.json and https://artists.proofprofile.net/proofs/artist/b71150f0-b18d-44b6-b2bc-72efc5c2aab3.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
All That Matters (feat. Troels Abrahamsen)
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 0x2d8c0b2863ffe56c8c2877c72220b7cbd266b55480d089b6583c23b02c4a2284. 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/DEU671200122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a784a3924078a642a42bebd1346bdcd1bc6559bc1503c8e72e5aba8a65e0ca3. 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/DEU672300720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7340b480bb662824a88b36e08f96c9ed46440964d44fd0cf0e7d211087899c75. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/DEQ021800345.
Cut the Strings - Nowhere People & Oliver Klostermann Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb47d593f6eccb9a1268180c58db77e485912b5a43f43be87b0704c681b46c6e. 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/DEQ021800347.
City Lounge 2.0 : Chill & Dance to The Cream of Electronic & Pop Music
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0031d3e218f73d07d20542841aeb97c568252d4fcad0c3f090953020d1e9a160. 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/DEU671400254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5736e0432c735a21e52cd50d4d7664618d3cc7ccfe67b04f6b083925af861645. 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/DEU671300130.
All That Matters - ARTBAT Remix Radio Edit
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a784a3924078a642a42bebd1346bdcd1bc6559bc1503c8e72e5aba8a65e0ca3. 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/DEU672300720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13df9ee62c634f986742e996624861fc2975a20bdae00b5282415ec16184ca5b. 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/DEU672300646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d1abb2d61441c4b4be379ceb9fda65dc67c0f56c703e0f1794e83914d1c0cd8. 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/DEU672300647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3652a200852c6d81b9a56f215fd3db7fbd0ac7ea379543b9720f4c13b11ef166. 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/DK4YA2400106.
All That Matters (feat. Troels Abrahamsen) - [ARTBAT Remix] [Mixed]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x216983ae995f662ddd24a8b5de81ffeb47019d6fb148858f76e70eb9a0d0af54. 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/GBHFW2400022.
All That Matters (feat. Troels Abrahamsen) - [ARTBAT Remix]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13df9ee62c634f986742e996624861fc2975a20bdae00b5282415ec16184ca5b. 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/DEU672300646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5e31d12836456bf5cbfca6fc35334bd36b529f64e6b3f62fb86ff429f48da14. 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/DEQ121855839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d84a8cc4c6f98e31ab1f77cc9f57a9576072ef50cd4904eb7c8be6dd32a9832. 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/DEU671500194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd803d0bde710429d6f3cec75f0ec6b71d0ddb4a0b9b1124da17a8714b4745bdf. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/DKATA0601703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6540642afd519dbff6928a1c072caf6ef0aeb5b46261e214f35769985f8b759c. 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/DEU671400277.
Chill Executive Officer (CEO), Vol. 9 [Selected by Maykel Piron]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a445c2d3969e72fc533d6a05dfa8c55d0e30a7402f112a2cee121e51571f3be. Chain 2 (Bitcoin): anchored in block 960383 (2026-07-31T09:50:37Z), 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/NLF712104617.