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 0x42e396fba474d4ef8c880d9f5d599e9eb3ebc13ea9e261df3ef43158d09a7b92. 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/f00893e2-a1ca-4a8c-8ac3-308063f63ad0.json and https://artists.proofprofile.net/proofs/artist/f00893e2-a1ca-4a8c-8ac3-308063f63ad0.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 0xa9af728acc29c987148eef4409f8c876744977027b904f5ef6fc834f4e17a226. 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/TCJPZ2432051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a30c7287cfd6c03e089b5ef1c2c2b6b3a07968202e96722cf038f6f5e390cc4. 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/TCJPZ2432054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1120cdac02988d45dd5a373e6e54e702296b2a9c415947cc4ee042db00d97b4a. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/TCJPZ2432071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82e8b7792cc2c9cdb04bb1d3ae978dfa9fceac09fe9c143f4c70dbc5e6a3fba8. 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/TCJPZ2432078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31f92b043ad7a2f3917b2587c3e579bb240e3baecb7b5f69b6b1d7b0df4161ed. 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/TCJPY2362387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63cf48f686496b9c641fa07737c1029fe2dc5ad63e72fd7346029d15202907ac. 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/TCJPY2362423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd307a48fa1bda670df204775fa157c720a5922346b16f17f6167cf4b2a44af95. 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/TCJPY2362446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5e7ab8d00b76f82e2bc337631e4527b48312554e4da4c67a2cb1c8de986209a. 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/TCJPY2362463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5ce5a9105ba33773e7f2bed0528c6341f409fa780f58ae99057365b815d514a. 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/TCJPY2362504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70f7f93948d7634fc9b7e091f49f5b6396fb0a7ed36ffd13e728d869267e11d7. 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/JP92N2433717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fcf6de4fe0ee9ab7c8ea45d43ef14fbf140364c288eae4c4f074887ca5fbf21. 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/TCJPY2317057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbfe9f741e3ac14ced487101453cb584d2ba4a8b6640dd20773f55d7cd8df618. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/TCJPY2317053.
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 0x62d1bb16bd5442735f0f2dc94592be7113ffcac662024f2f54a532624a4c0cb6. 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/JP92N2447886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa295a305c2b36a4d8ec43a1b2e8e3900720e350e9fc72021c3e4e644cbec4512. 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/JP92N2443078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54e52fb1c12880c88ce08f8e7a2b67ff39608a19ac9dfa9d83935afd8a909980. 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/JP92N2439362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b2865178092863c991ee85aa40266895e6ed0b68f0e581a209c94992af11871. 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/JP92N2432410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfef052460f44b898bb0c4cddbbe1c210ad5465b39c58c03fce6420068efdfef9. 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/JP92N2419797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4d542a4a36e83843ab4ef732ef7c86920dab4530caa9e1affe572dc1a6d0662. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/SE66N2347799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0786322233a2369ac3896b7706fb84f849aa0ee4f3edb236369e9f22ecff0bb2. 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/TCJPX2358795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b4a9867ab2a735bb28a24b3e1ca06156aab6f6effe8f9a67739d1ff6af224ae. 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/TCJPW2361100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc99b8489b4623a01ca571d2ec36e9e5f4d87a001d65ba1dd560de332b33b6e8. 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/TCJPW2336175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x874b583acb11b479332d87479a11b5dd12fbee6bd976fd350128a838419ead95. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/TCJPW2370032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6286c5a6233ec61e29fda4e904840c5b0ccabd2f15074e816875965a71606a8. 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/TCJPU2364901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71cd50808fdc5c0ed09ca8c74e0076f0783e01f658bc1d0dd0b0aad7c24c8cef. 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/JP92N2428957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb255534ca84618e93424ecde9f00bfb7ad74b774656ecdea236a951f585b2e21. 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/TCJPC2435279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31c63ecc38a4cd5c6f142cbd53e5a9d465cda8bbc16415386bd9e2375cf10a77. 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/TCJPC2435286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01ae88770b1f9700f3548f7a35c370c7feb8cc497ba2c647480fc65a187d5c9f. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/TCJPC2435291.