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 0x8cee68ace1b7e3d1dd525739e5b0b858dd1cdf65b4a08b90f4825d144b2f1ee4. Chain 2 (Bitcoin): anchored in block 953717 (2026-06-15T01:05:33Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/876f43e9-79be-4213-90de-8815ccc3aff5.json and https://artists.proofprofile.net/proofs/artist/876f43e9-79be-4213-90de-8815ccc3aff5.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 0x32056277276b35a7603e306137c33513dd833f8c7142c8c2b0055ab6e39bd6d3. 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/USGC61600779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dc92a2bf20cb4a6057e69d9d326b8e4b2a087aae8ca3637aa9f358363f63678. 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/USGC61600780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x681374eee07ebc8b68c1a123b6397c689b1fd314497a615719d1ee403c4592b6. 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/USGC61600781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04d39ac0dc061cc74ad7626034f8ee71f8ecdb8b9fb1701cf40d9792fdc6d39c. Chain 2 (Bitcoin): anchored in block 960191 (2026-07-30T01:51:26Z), 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/USGC61600782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2f614988a064135228b1d078fae00db84310287311526f23c23e1319301fb3e. 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/USGC61600783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20526e366d3dc0ad3403da314360b8980471052c4e3f55e594aa8a5a1dc205c8. 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/USGC61600784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7cb2b346c80538930fab3f5c72483e5ff30c0e3138b3cdef2acfbacad2d62d6. 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/USGC61600785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d7d4be9bd02ee5fbc511563f28c63efec67b2ee75d9edd74127c1325909f966. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/USGC62000888.
Keep It Working (Jacques Renault Remixes)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73b23b679a6f54ec4920b03e3b4cb1673b12e11d6ad7cf3a9c38fb18d5f53a05. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/USGC61600843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7279c3098ba2f634832494e377c24da2e35e6c71b79fb3112f141442a19074a2. 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/USGC61600707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4352b1f99e62bf8e04ef49f83038ac7e140224cd5f476d65dd515df1974ef97. 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/USGC61600708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6de307d46a8fc124e284ccc6c5e3032518b8a75e6a199e76719f14f26b954a6e. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/QM4TX1759917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed07c09aadf8d46e82a356399dd3339b51c605758727cb6c9134128810279e9b. 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/QMBZ91640450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa0a9c1c60c4ec5097f7eb9b782a7cc378179c4dc567a4997ad187677d853a6c. 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/QMBZ91640451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x305f84bf57d45cae9f9a3d12fe915c79d9ee916f865d6daeffceb56a7e46682f. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/QMBZ91640454.
Gilles Peterson Presents: Brownswood Bubblers Twelve, Pt. 1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9377e1afc669f9b82cf4cde7c735857a5b03d936fdd9920117f6c04524402be8. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/DKQD91700106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0661dcb7df879f451b840e6c3ae7eeb64d3a94e7c3014fdc4bc0a67b0296e7cf. 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/GBMEF1600952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbaea7dff65687f12a6e8571cf054518f3d7a0b4ecd1e9074053d0777f417b03. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/GBMEF1600953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f415a1b14a49ed09ccd402ccc22ef10e37a19a084592e506fd08417fa7296e8. 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/FR10S1743195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1a54da18c431ef1227992fad39f1c5758f1611c41ddc050a9d64e89ba48ee93. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/UKB8U1500056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f2ed0d8938f8a75b44aabd4cf884223e2f3b8aa60c7aeb85827284e702daf55. 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/GBMEF1600956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5074620840de924ebc59217bee830740a5448d4a6371a93e4af40f895c216eb. 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/ES7381500012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4872fffcbbb236ba9b59577dcf619efa22c2301844999fdff5278ce6a9f03f08. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/GBBHN1300034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9360eaa32dd584f9ab44603b667052f7c0c0c8a2365b709bf22919f908c7640c. 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/GBBHN1300039.