thumb|Marc Moulin Marc Moulin (16 August 1942 – 26 September 2008) was a Belgian musician and journalist (print, radio, TV). In the early-mid seventies, he was the leader of the jazz-rock group Place
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 0xeda9741d82c0777f7d6011a7aa8aa15cf6a26326e00c2fd04991bb182119ac89. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6aa9bef9-2f4e-40fb-bf86-4c4d7fa8a028.json and https://artists.proofprofile.net/proofs/artist/6aa9bef9-2f4e-40fb-bf86-4c4d7fa8a028.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 0xee58ba6c073c15eb26e10add452c27d27502328df155cb3f12269ed9634701ae. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/BEI010111302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78f738f596c9d517c333b4292bb68000d35493edb630bcf15a72145b92693b89. Chain 2 (Bitcoin): anchored in block 958667 (2026-07-19T05:04:54Z), 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/BEI010111305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24f557621a25232bc5114fa4e1edabfc0bd324c9be17e1a8219253bde1846507. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:00:46Z), 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/BEI010111307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dbfcd3422050536db4c2ad7d0aebf1b827706d43554744fcfb040757b62ed9e. 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/BEI010111308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d93dcafdbfca2cbfe1fa274afa3283a25bd562f6f4dbe386e691f0f2080ec21. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/BEI010111309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbee062b0db79a09b6a229f25705287e5f7e78d8b37b1274abd352894dddb7d30. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/BEI010411301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e1123eacf19f68aefd7bec619088539fc445f90dcc47736cba75d98c76d785f. 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/BEI010411304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe65de0123cac8ec522cea883f570352c1671acfc5a6873e703b920ade0c8c47c. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/BEI010411306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x745acbc1f626e39786e476889c39fb3374b07a0398eb5dbe0cbfc71b5638e3ca. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T21:23:21Z), 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/BEI010411308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac71542616221d33cbba2c54dd37c807839992e40ef2dc0d46edb38712d6d00f. 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/BEC420600004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb038e64c289cd315aa0e3e9273c83f43407b6f3fcb30794b56eb5509dc23179a. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/BEC420600007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac71542616221d33cbba2c54dd37c807839992e40ef2dc0d46edb38712d6d00f. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T17:34:30Z), 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/BEC420600004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x641baeef10ecab01a4afeff91bfb4a19996316d10bcf481c1ac967cc274d7524. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/BEC420600006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb038e64c289cd315aa0e3e9273c83f43407b6f3fcb30794b56eb5509dc23179a. Chain 2 (Bitcoin): anchored in block 958523 (2026-07-18T08:54:12Z), 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/BEC420600007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f8ce877e8e184ba9fcd373012894bc16435abb9111d1ed27d2f5b05b66ed2ba. 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/BEC420600009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ba139b09586242bf402d0985989cfbc6191d383dee4a84d55c2a1539454da51. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:45:06Z), 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/BEI010600170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ffbebbe43febd345e848b10f1e3812bb09d1a6fb290d93de2ea212ae91e1eeb. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/BEI010600174.
Blue Note Trip 9: Heat Up/Simmer Down By DJ Maestro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf231fddc52ac0ae71a5ef5ec7bfc314f0178fdd7a849713cd15ec5036a544f39. 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/BEI010411309.