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 0x262531429f34661d6f414fa049e6e19f85813fde95778d3110b36f15ef427bc0. 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/04ebb647-6b76-4908-a28a-e62b39c8d2ba.json and https://artists.proofprofile.net/proofs/artist/04ebb647-6b76-4908-a28a-e62b39c8d2ba.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 0xd1f23c876546899871af38c66590050454c6a1edca82f1a84fd0294c280d1684. 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/ITA642200092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd56dbc2f6a1f4d2fb4e4216e0f565ab120db71a3e4526dad5c90e39010a72eb7. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/ITA642200094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1f23c876546899871af38c66590050454c6a1edca82f1a84fd0294c280d1684. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ITA642200092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a987a95f4fed88e8fc842c3d3924ff505506b29f18d055cec12c6a1520a75f2. 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/ITA642300038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e0f5d9f1541323bbdc3d74c897221898296bbd189dd5ff66f39ed817acabde7. Chain 2 (Bitcoin): anchored in block 960177 (2026-07-30T00:21:01Z), 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/ITA648100936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x579cb6365b6b48f43e78ad1d7c057065fce4de96abf98bfdc34c43de6ecbf01e. 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/ITZ332100088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1f23c876546899871af38c66590050454c6a1edca82f1a84fd0294c280d1684. 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/ITA642200092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75e59ef3be32691e6629a5aa4b83f8bf9a0fc458b04385a54258e81b54872ae3. 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/ITA642300040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x728dade4e067516af6aaaf0093ed769bb098d5953818131da889217121663659. 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/ITA641001733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72dd18967334e8d10067ce729b3e430210563ffb29b5c585216d601477729ae6. 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/ITA642300036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ff8c41870689e0897d7680ef18abba26866cf8fc97e84b797ca5bf94642a914. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/ITZ332100128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f0ba7f30a0319d5a5dc32c0b9cdb8f2fc2916ac4a051217980eee7a27b97ca7. 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/ITA642200027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2de3c1fcc5f0bbafadf146e762e73da9ca85a5c1092cffea9e134611c430d603. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/ITA641001734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95e2f383c0961940d329ef6bfdbcd0fcd9dc887772366280e33486cbc8718495. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/ITA642300041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c6428dd551a973d9e50aecb4abb7f6e0cd6f669ca4e40100d17a0674a65004f. 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/FRX202047009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82b9f14982f1449d5e1e99ba5b7ec94868ef8c24e758a2e6b93c4c80cf0e1857. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/ITA641900071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85e67a011ff6adc0098d731554f347178fd38fe7dec8d2d694c2b863a4c131f6. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/ITA648201218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x267781e75ab134a25f9dc77407482cb62c7ccaaa6df34c5c0c226fef3159b118. 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/ITA642200121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bf086ceaac0cd4357284b69b8c24fed5fac47b51d1ffb55233eadda1a596db5. 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/FR10S2070677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd20ed55a1b889fa24309564b9ec028b6631112d255cd73b71621dcc014f67f5. 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/ITA648100937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe00be2f2e1d98a36d118f2a1ae58806d261cf8a4fa152983abc1a0cc8a0d6cdd. 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/ITZ331900048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb7e77acd5b42b57ee63e74b0b8a7a53fe700647fb74dad1d613f993470598f1. 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/ITA641001735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8defba27decedeab69b2c3b5daba39b33700561f021f19b86d61c943edf280cf. 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/ITA648000941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58b9348c962d86c935c513463c90f7412bd231ef143d25dc9a1180501dd74e6c. 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/ITA648100934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84828d2dc2851903b4709272b404e9698604c4164e728e1c91c6085cc53b6c02. 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/ITA647900295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ff8c41870689e0897d7680ef18abba26866cf8fc97e84b797ca5bf94642a914. 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/ITZ332100128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd56dbc2f6a1f4d2fb4e4216e0f565ab120db71a3e4526dad5c90e39010a72eb7. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/ITA642200094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd27fc655c686bf72a25ce6be8e493c6d801b22f30637f925d2bb4c5b212c10c1. 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/ITA642300114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5d2832406cd25c331fb1715dd29f3cb958c56c52bab5bf25a2afc5bcb7df43c. 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/ITA642400038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3794fb930ea35e896d748d2b500e5e26f31ac2106e65c32be0b8c753f2e0ef74. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/ITJMO2400054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f4cd0010f1f0a60e9ebe8dff5baa2783b8f5740fc1ea7a71f53a481fb304244. 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/ITZ331900004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82b9f14982f1449d5e1e99ba5b7ec94868ef8c24e758a2e6b93c4c80cf0e1857. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/ITA641900071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fe3d8fc7cd753edb49785dfdeae9a8f755bef1d3e5163847b549bb7de8f3597. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/ITA642400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaca6bcb9ec840407a626e85d982e1f11d768eee2ca015b054f5bba06de550b5e. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/ITA642400040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c87c10a0872afe6556d86467af42d491286a4d5dbe1c9dea31584b9cc166087. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/ITA642100130.