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 0xf0d3e92b539192a1661e97fa210e4f17054b60b494253a3bf33228e271c9422a. 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/c7552d77-6cc3-42bd-9744-f2b4af4b4944.json and https://artists.proofprofile.net/proofs/artist/c7552d77-6cc3-42bd-9744-f2b4af4b4944.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 0x165a3d34aff0527acfdc1cb70ce0764e34a6c7d79dd958733275dff86dfa9864. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/ARF410300077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27917121802cea9808e96188adbaf43270e52e1cea68e82aa752859c482cf120. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/ARF410400026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaca3e885676c99158b333af7455005a991b71ee46a873b8dc729301f15c4c013. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/ARF410701306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa33972ab6744f7b7c914b050d4f16ffced7d3e8d87d690067bb7b16e8d8613ce. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/ARF410701308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd90316288a418208ca28c327264d45d32618bb21dd6199f495e5bf317d7d910c. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/ARF410701309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bf06982975c42076a7a4013f59ec8036514350c9b788cd54d59a96b38d59e6e. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/ARF410701310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc17c73ba9498115198c764aa595d16fdcd428e39c409ee83ef6a75a306e10104. Chain 2 (Bitcoin): anchored in block 959103 (2026-07-22T05:56:21Z), 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/ARF410701311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5834122b49e57a3d2095311706e70de247a9dad8a33f2315aea6a61e4c548b5. 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/ARF410701312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d30cb4597af3bd9dd24698a30b6d9d3a094c560713585bbc2b17bf93a5eab17. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/ARF410701303.
Vintage Café: Lounge & Jazz Blends (Special Selection), Pt. 2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d30cb4597af3bd9dd24698a30b6d9d3a094c560713585bbc2b17bf93a5eab17. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/ARF410701303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2436b4190929038ca0212949ad734a62192e1d1e1bc239649d5785e2f236947e. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/ARF411200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d30cb4597af3bd9dd24698a30b6d9d3a094c560713585bbc2b17bf93a5eab17. 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/ARF410701303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc12d4ced65fca5a303f1e11524678b56289d5f2a125b07fe2499a8be288a488d. 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/ARF410701307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2436b4190929038ca0212949ad734a62192e1d1e1bc239649d5785e2f236947e. 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/ARF411200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dd92637fcd71f83eeb153eec7c944d75a578883e1721b3f2423e60ebfd5d360. 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/ARF410701305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d30cb4597af3bd9dd24698a30b6d9d3a094c560713585bbc2b17bf93a5eab17. 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/ARF410701303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2436b4190929038ca0212949ad734a62192e1d1e1bc239649d5785e2f236947e. 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/ARF411200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x165a3d34aff0527acfdc1cb70ce0764e34a6c7d79dd958733275dff86dfa9864. 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/ARF410300077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2436b4190929038ca0212949ad734a62192e1d1e1bc239649d5785e2f236947e. 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/ARF411200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dd92637fcd71f83eeb153eec7c944d75a578883e1721b3f2423e60ebfd5d360. 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/ARF410701305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2436b4190929038ca0212949ad734a62192e1d1e1bc239649d5785e2f236947e. 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/ARF411200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd90316288a418208ca28c327264d45d32618bb21dd6199f495e5bf317d7d910c. Chain 2 (Bitcoin): anchored in block 960193 (2026-07-30T02:05:19Z), 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/ARF410701309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x165a3d34aff0527acfdc1cb70ce0764e34a6c7d79dd958733275dff86dfa9864. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/ARF410300077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd90316288a418208ca28c327264d45d32618bb21dd6199f495e5bf317d7d910c. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/ARF410701309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x423a086ba2e867aed2ed46a1ee1ac594d94835c158d2dcdb78815d3616c6499f. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/ARF411001432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc37ba1f228ebbb350661d9e7e65434ab8d0fed38a9af7828361307c7c7769d8c. Chain 2 (Bitcoin): anchored in block 960314 (2026-07-30T21:00:46Z), 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/ARF411001441.
Chill out Trilogy: The Definitive Collection
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x165a3d34aff0527acfdc1cb70ce0764e34a6c7d79dd958733275dff86dfa9864. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/ARF410300077.