1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → block must exist at that height 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 0xf4134abb6f9a7a01d374146c369f307ebd27e6d8f3c83ca9ab8eaf5c6bca8a1f. 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/0fee76df-e8cf-44d6-a5f3-b06571e5a711.json and https://artists.proofprofile.net/proofs/artist/0fee76df-e8cf-44d6-a5f3-b06571e5a711.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. GET OTSBitcoinBlockVerifyURL → block OTSBitcoinBlock must exist at that height 3. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 4. GET OTSVerificationAPI → pre-computed 6-check result from server 5. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeec84bc67f94a5e116e677434477bb92225e34f4cd1d95fc84927f142fe30748. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/4OX8xCpo7FNxekibJ1Lh6A.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/4OX8xCpo7FNxekibJ1Lh6A.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaf52edbeb3d0d2574bbc4d31575047eb6406304b3691b3be06e9db9ea864e7f. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/0qlQ7W9xpktmNY5CAdqa3L.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/0qlQ7W9xpktmNY5CAdqa3L.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82df5bc0f207f63eed80f4109ff552650e2477d77d5acd4ed8ade954945d32cf. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/5hsGMffSOWW0fPTzZTPzjT.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/5hsGMffSOWW0fPTzZTPzjT.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb67bf6776575a681863045b9a61d24e94b4ad977285dee43467848ccd07ddf21. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/5weMcTdGIF6cvx5wXzyfb1.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/5weMcTdGIF6cvx5wXzyfb1.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6e2194218c81825820b0a857f1bc52c76a9a5ef1c482f0ffaf40b66f1a8e320. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/2yQTF2kyJayBzLUMBdbDQm.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/2yQTF2kyJayBzLUMBdbDQm.
{"copyright_id":"0xb9762787012875fed7db02ee31a3ae5ed622deb1f6ed5da65c8d2e0fdf8ad0d5","isrc":"US3M50122907","name":"The Power","registered_at":"2026-06-24T08:07:53Z","spotify_id":"5xMGWFP0rCAIpKQcw67gi7","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9762787012875fed7db02ee31a3ae5ed622deb1f6ed5da65c8d2e0fdf8ad0d5. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/5xMGWFP0rCAIpKQcw67gi7.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/5xMGWFP0rCAIpKQcw67gi7.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaf207e035d64b7815c208d09e128f2b4008ad26eb867b0f0347469ff9c395c1. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/0MDn1mU0QR6RxhAAul5x4U.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/0MDn1mU0QR6RxhAAul5x4U.
{"copyright_id":"0xd6f2b049fa228c7027f20bd2621015804d279ffec7dd5ef5dbd82eedbf8c356a","isrc":"US3M50122909","name":"Milk Cow","registered_at":"2026-06-25T15:13:19Z","spotify_id":"0P0lvwiEwR7PvaTIdUYpTs","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6f2b049fa228c7027f20bd2621015804d279ffec7dd5ef5dbd82eedbf8c356a. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/0P0lvwiEwR7PvaTIdUYpTs.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/0P0lvwiEwR7PvaTIdUYpTs.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa36bd2cce826fb10770a087d22005ca7929249499f041c8ef2d7c86bd6113f0e. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/68HbUWgNIywckc3L7ndJrz.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/68HbUWgNIywckc3L7ndJrz.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2bd0dba546aa623d7c89e4584fef48693970f789ba66d969b8f99d2430041c9. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/0KzE0eTgB08jvVqjak7mzw.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/0KzE0eTgB08jvVqjak7mzw.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79bc6d81be1508494022b58144f553c16dc22d387bf8598b2d461be9560c0092. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/5Y1vWr4fjTEnuFAOnvVxlR.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/5Y1vWr4fjTEnuFAOnvVxlR.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x429c85b9f5c03f81f6aa1250891f7f358b8fd6b023485641df6e3e1f710403a9. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/0wsZ2aWxQsdK85usQ9pMHn.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/0wsZ2aWxQsdK85usQ9pMHn.
{"copyright_id":"0xb2faa06dc4d119c5e92dbcd7849e953d8e6ee76392f8cc54c782816873d20201","isrc":"US3M50122914","name":"Save Me For A Rainy Day","registered_at":"2026-06-26T16:17:36Z","spotify_id":"40lOxOuciTmBguWexZIPdk","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2faa06dc4d119c5e92dbcd7849e953d8e6ee76392f8cc54c782816873d20201. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/40lOxOuciTmBguWexZIPdk.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/40lOxOuciTmBguWexZIPdk.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x212141ddcf34ed6cc4b14f73ebce19047d1f60c6964c3b09a0890be298529193. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/1KAIZacQB9ix28MkMBbEB3.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/1KAIZacQB9ix28MkMBbEB3.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2af87f085fe434785110e6b41212d435348c5dd608e20235f28f0d8cd62a2973. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/1a2lWeYFXfFd283qdUgIs4.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/1a2lWeYFXfFd283qdUgIs4.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x932a74806521379aba3ccbc8ffbdc073749d438adc27f8af45d6098cc9c3a872. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/4DVS5T3KY48C82lZWTXlEs.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/4DVS5T3KY48C82lZWTXlEs.
{"copyright_id":"0xa1673ebcdae323d0a4c7a155e29eafbbb7efbcdac18bcfb6e1f50d607979247e","isrc":"USC4R2334232","name":"5 Pennies","registered_at":"2026-06-25T16:28:46Z","spotify_id":"7GAQ04fDke9OTx1VHOsHbn","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1673ebcdae323d0a4c7a155e29eafbbb7efbcdac18bcfb6e1f50d607979247e. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/7GAQ04fDke9OTx1VHOsHbn.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/7GAQ04fDke9OTx1VHOsHbn.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc9234d6a80bece2e238a3cf15928c859cad906ff36a6e315c015dc641e985d4. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/6ZcrtOEIUNpV33VmOslBa8.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/6ZcrtOEIUNpV33VmOslBa8.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d103a455c500ae3411ce2fd35f758a9fdebe4e304792ae98d8b10fbb33f62f4. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/2ffHw7wsoGQGVRpuUALS3N.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/2ffHw7wsoGQGVRpuUALS3N.
This Is The End: Original Motion Picture Soundtrack
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec17b5ec034a7820cb2a16812fc3d0f2c0940d9006b31990e6650ca7a2f72235. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/0jvN7eQJJt4nxQzgQfZ1SP.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/0jvN7eQJJt4nxQzgQfZ1SP.