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 0xf5df50be2e6cc8ec29308afeeaaa621a67f2ed493e5dd789b04ad3ef8db1de9d. 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/9d3ea2b6-02ba-4916-926f-1035f5082771.json and https://artists.proofprofile.net/proofs/artist/9d3ea2b6-02ba-4916-926f-1035f5082771.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 0x4b5901baf3a7e7b83cf51723d824a5691fd53fecafe47083c159fd82b0211bc9. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/FR6V81168310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd78eeae244eaefbc92c7f06753f33081f1db3d4f4a30520bc647b5731657da97. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T12:54:58Z), 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/FR6V81168311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6be6bbeadc97a0109aeeb7f962f332f66257965a940fbb0a365829e4692ed339. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/FR6V81168313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95831343479ac55ec0092756bfbb725cbbd6bd928b5a1d6856b1ceab2b7f1c71. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/FR6V81168314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cb3ccf26bac9eed1494574b5c27860eb23e84a73d954575503d1cf23351c9af. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/FR6V81168316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f7f20fcb93d336f3db21c0bc8c2117bec9240354edc9fc473b803025194262d. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/FR6V81168318.
Le classiche Napoletane (Best Neapolitan Classical Songs)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4d3cd0820314af74e0d6702c845f77a8134101056fa0aa5b7967ad606298e8a. 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/FR6V81678349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa79f90686307740b7bb6f2bb9c50e18f761f5e5d2df988293975388600935cef. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/FR6V81678356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bf9123f16836b47cbd3391ca2ce43c1e9672296ed2ec052a64b5fdc91062963. 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/FR6V82540159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1731d11e6975e82f90919c8c858ce405b8acdebe03dc87d42c35942fd307f160. 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/FR6V82540160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x787aa1e487db0c47b4c442b2a47b7054dc4acc4c5a3070c7e5c51b074ad1f7e5. 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/FR6V82540161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eec5533bd72b74a7062ec4d4f4dc775636b6b6d019bf0a9246eefb10c8eee92. 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/FR6V82540162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3292c47fb8ded113bd9a3ef516909cadb015cd057b1daaebb661aa3073db8b8. Chain 2 (Bitcoin): anchored in block 960198 (2026-07-30T02:21:55Z), 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/FR6V82540163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06abc0727e197422bd6a881f441b9d2de232a6fa998f23c454085c1f7b0ed29a. 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/FR6V82540164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53937587ae1d28bf7330dedf29314770f4d7e93fbf1d98d6b360b1e43fca070e. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/FR6V82540165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe21264cf342efdd731e14ec4c8050b39a05c97113e9f4800af587ef76d4f76d8. 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/FR6V82540166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x029b64c4ce392c1ec7d736dd324d6bbb22b4731fef2de7c4e0ebbcc6ba78ffa1. Chain 2 (Bitcoin): anchored in block 958571 (2026-07-18T15:39:25Z), 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/FR2X41643682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x372e63d78fac28f4144e28fdcf0c9b7fa85ca9445070e71fd80d39814a4c73e1. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/IT8TZ1715701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x252a5a83ff329991cb206e6ce1530c84291e81afdb0c5af12374eb45e22645dc. Chain 2 (Bitcoin): anchored in block 957884 (2026-07-13T16:55:06Z), 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/TCAEG1995136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f30c4a7fb31644863cfd71e0b8703151592a3bf168cf876b06e468a78373117. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/ITVKL2200440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7657154c2fa18d24e0784bf6f215f070e46f50c4dbaf4903df55645dc7faefb4. 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/IT9RD0500007.