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 0xd11ac3bd9ae51313eb9cbceb860120723b5e60956b6a1217f72f1f98cd479ae0. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a10f9088-c0b4-4000-80d4-c38f593ff46a.json and https://artists.proofprofile.net/proofs/artist/a10f9088-c0b4-4000-80d4-c38f593ff46a.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x223651d0b8fb839dacc0bad4ef2e06234ad181986731e42eb627908e8d66fba8. 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/TWCC32122178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda48fe2e22d8c26171c9ecd1d2570422108d104825f721387685b6893cc21008. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/TWCC32122180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe44d9fef54ad830c5f487b11acc645b5b7131783644f806a21378e243da1d877. 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/TWCC32122181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6f8ba37c2fe4792911c1ba1a0f9ca8f418193237c150405b75a3d960285e1ab. 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/TWCC32122186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3180397181e7f04c815b0420d5fc06e7e2d32b32b188a95efb087f40effac4cc. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/TWCC32122179.
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 0x79de9f445406877ee272f1de85500388be9a0f22d15c943d69cb1b5c81b25e1e. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/TWCC32122182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3332edd05b4fc64311e4b07c429f7e89c950608c429b8b14b3203571ba43db5d. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/TWCC32122183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9c44fd21908923ca0e09acd68528fe4fe115d8821b1a404d424f5c8d8f7e288. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/TWCC32122184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb79f03716b95e6e8e687a077502318c4cc447e0266430f75f27892fdfb7efd26. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/TWCC32122185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88d544b217511ca090e1d6bd120177efefb4a641751bd9c0915bc022001553b3. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/TWCC32122187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2975028b47f47bd67a4a492151b7a07e11d7908f942617ff21fd244c87d63b8b. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/TWEG71818001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26977d1e2c3c0f4474e726cb835bd9d297d2aabbcaa476e6101f35de29ef3937. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/TWEG71818003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcec0a83f4f2879ee57fe6844ea8366bdddd6118a37fe4f6154bf54615eef8ff2. 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/TWEG71818007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe47e896918d3efd308546080450d0b1fedfa3e1fd5a5982e22c6e0ce6558ccfb. 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/TWEG71818008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd28a7e9a89ce0d3e3390be85feaf696b96be9ffa60599c6ac31815b6e963647f. 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/TWEG71818010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x139078291bbf25e643d5be58ddd9c01cc082e0ebefcc48f42ab717b57c3a79db. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/TWEG71818002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0e6a21cd82ee82ecc5970af5e519d408b3a8e58906de80b5b1849edf6789b7b. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/TWEG71818004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d2f655a79993447e65a64baa43a26feb3700dbeab812e532c6a2de49f154226. Chain 2 (Bitcoin): anchored in block 960285 (2026-07-30T17:26:40Z), 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/TWEG71818005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25775e39c3fbabdc582043a357f2c49a948dd82b3b79f2b60c002bd0bf56ea5f. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/TWEG71818006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd7f5bf4ee02721f6e9c7eb83852985866064add7fb385a61121e9b96a6535f4. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/TWEG71818009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fa01f0e7922430ef6a1ba80a8edb67f04b2a9b60baa024752484c9e9b9d98e4. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/TCJPL2010911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24092d9e72160bc7aab8d87359c783b293a135ec9d14627b86a4f8cedd2ab0ad. 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/TCJPL2010914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x266f2d4161978cd32f01fed686dba23e9b7500768153cdfda98759e99326db60. 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/TCJPL2010935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cd32507d1229fdf6a668a196d3054166916fca3ef4aa395b0cecadcc018bc37. 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/TCJPL2010943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x445e0404f317e23f8384b5db2d4ab02fe66fd010923b5405466ccba327b54cf4. 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/TWCC31802219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01f36e644cb2f9b13a902251f99cd3d0761c73b51b8c682fff1cbf662b540400. 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/TWCC31802220.