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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcdc4ea9887754cabe0360fa697677f3ccfceb8c70de6e41806defd0286c0bdc. 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/03b262e7-df37-4e08-a10f-4201a320c234.json and https://artists.proofprofile.net/proofs/artist/03b262e7-df37-4e08-a10f-4201a320c234.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Schumann : Kinderszenen Op.15-VII. Traumerei
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ae155f068155c14b836823aa1294fdb15f5934fa4d6b173bf9ee585437398f1. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T03:32:57Z), 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/KSA012128612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76568fe2fc0b836b157e554c2c1133e37bfa85028c1323f165cd5c28bb9b9224. Chain 2 (Bitcoin): anchored in block 956862 (2026-07-06T02:10:22Z), 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/KSA012128627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98b41ef58c53f09291e2f11cb9e6716876ebfdb88a1548f5b448bf32954f07ba. Chain 2 (Bitcoin): anchored in block 957744 (2026-07-12T19:15:44Z), 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/KSA012128630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf80d1b86354f7e5bd4fdc6c5d734fdd7374bc0f95d8f428c66dadea01966cacd. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/KSA012128632.
Strauss : The Beautiful Blue Danube,Op.314
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46599fbc35219643566ffc47609927ca460b65ab085fe85d3032781796706515. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/KSA012128633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x756208739827036de0a09ec4f4087465b97050a80752c228fdd4f73fd7d184da. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/KSA012128634.
Dvorak : Humoresque In G Flat Major Op.101-7
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdde53f0fcb394300da372aa7c9b929182969690467156dfb6b32821d907a61d6. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/KSA012128636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeff40d341afeede19604b609443342ce16d515224bcad711c52cf1c321318447. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/KSA012128639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde6f6f6f226df94b940a808fd80225144a097f8c98ba83ef337766b490fa52d4. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/KSA012128650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2d3056e36a67d27f49a14f1925a384da7f27613d1660b06d940d487e5273c98. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/KSA012128654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cb2e26c5fbdfd5742c37f52d0ed08d066619244d3c8a947fe5e5c78c1b64f46. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/KSA012128658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x663f6d1ed9476f91effda2a0348ef9dab0c705d06777e1e146953fbcd9a7f4a0. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/KSA012128659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fc45657c83e9b8f1d78f13a16cb688b262213e1a96a91818625c18843109121. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T16:05:06Z), 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/KSA012128660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e82e459e95643e44df599b63789ae7a6e292d5107835910817885d2ec2d09b4. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:24:52Z), 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/KSA012128661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa19b575fd656afcc85ea986716df3d2a0cfa9dbd74b4c21920ee8e2f680eb3ac. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/KSA012128663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9122709f451bd783e9ed4846c8151c0a90e39943d7091a25eb63fb54d6024236. 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/KSA012128664.
Brahms : Hungarian Dance No.5 In G Minor WoO.1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e7b9078c3cc9b3c6f950319a732aee4a48d08d5ca160b6ffafc93eacb31ff23. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/KSA012128680.
Grieg : Norwegian Dances Op.35 - I. Allegro Marcato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc876826b0f5599c2e22cd76c1d68721f3077af5432719cd785f45205a39c8f49. 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/KSA012128683.
Mozart : Piano Sonata No.8 in A minor K.310 - I. Allegro Maestoso
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5372702901c2acf64d5b1e04a7d805b5fa3cf16ff46a26e41a340f52c5beb52. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/KSA012128687.
Debussy : Arabesque No.1 In E Major L.66
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73b9b84c36a47f625bef62dee25a475f202aa7a58ebf01188ed70968dd31f4b6. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/KSA012128700.
Liszt : Consolation No.2 In E Major S.171b - Un Poco Piu Mosso
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08218d2e3d54ffabbebc7fef2eac9f970f0614f17e2058c4db880e4a5d467223. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:22:35Z), 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/KSA012128701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7eed5c0b2ba7222a44515736fb6639ed76ac077bafe65d1e995270885e521a1d. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/KSA012128702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa663cfa5e92de0dcdcfc4d8010b0c7961de00851524b3fcf76ddb6eb7089ef99. 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/KSA012128705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd79c516a870bfb248933b03831944db283a0eb4ecd82e076a04e961fdd70a877. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/KSA012128706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcc5de8888d8a5a65688e7672aa735abc657244bc3760bcc3178337fa17cfc8c. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/KSA012128711.