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 0x5fcead0df928a84aae3e43e91aed0656dba224b33e66af57dca4606fbc2fd70d. 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/bb655ca0-0dd2-4854-adff-0228155e8746.json and https://artists.proofprofile.net/proofs/artist/bb655ca0-0dd2-4854-adff-0228155e8746.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 0x47e7819f5742dd0708945e153c02a60aa57b7db88b21f247ae862b0327998b6b. 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/GX4R52124920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb6bbc43c2a01140000b0e919410f72840d19fcf7364c467ceab64d3ed3485fb. 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/GX4R52124921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d21d7793d0c7372a26ede82c9cfc5f1130fd5044bfd03dfdacebc3556ccee88. 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/GX4R52124922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6536364933455ed6a379344f2dae74a8aca343c893015407c9f8db4d90acb901. 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/GX4R52124923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x670441ca7449e024280ac27b78f6ad252d563122b04659f43db8650c609c169f. 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/GX4R52124924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8be2287a8df1fdbd31dfe5c4e5df27c7a6054fdac077c29d7947aaedf0cdcdbb. 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/GX4R52124925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d3928a1ef2e2bd4fcfb99f3bbf47ac36f2184aa29161fd5de3158d0f4963b1d. 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/GX4R52124926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d1752760b913e2f47ba5aeeb7966c4747d741bb0d476575d052c64873aa6b2b. 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/GX4R52124927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26445cd394d130679af2f60f159bb983b552ae3664a0597bf4709a98daf7e9d4. 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/GX4R52124928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d0007df7d41970020392f5d454b5100ed414cdb9bb2054cfc45b2c262aaceac. 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/GX4R52124929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83902d6b7e3be98adbc3258dbe4359e5633fa309ff8faa89e986553d5b5e0f2f. 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/GX4R52124930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb984e7f666fe75b6a6f13e4989df748aa50709ad413d6510e3a55d89e599f1cc. 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/GX4R52124931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c6993c79095b83e09f16ee7bad10478afc6ede657d0be32a18184333d20ccd0. 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/GX4R52124932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46055003ec385a2a9942db5e326fd22566cd9817247e879b732d0277d4750bde. 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/GX4R52124933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27a5466939848a72a6362d8fd11526aa0fc0caeacafbe4484e386e692ddbdf8b. 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/GX4R52124934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9ec6b30408011c16e20402ec22c276cb9a6eaa1236d761fb7070b6e25e5e06a. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/QZZ662425821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55e4011053cdabc173264be75dd882d72b4c4cbdf0c632c86ba6c11a3a8a172b. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/QZZ662425822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93e2d50987a632e2e134f67ba5e069f61cb014fdc103d735492faa143041f750. 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/QZZ662425824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d6ba414cc293d40d3818faa4c406840123ca2442a1a16763ee05aa71bf7d372. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/QZZ662425825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2ba1bbb8c92208c6ef44e7bbfa117cd965bbd1d5487c25e690ff95fc6ec4683. 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/QZZ662440228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x637be10a7b3dc9121eb7b4af75e951e528ae05bc1e13293d38430d73829916e6. 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/QZZ662440229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76fa278291f9e35aa837e1bb76d8e4dc48f2446b0e9200e5ef847cdbd92eda33. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/QZZ662440230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf7789a9ccb2ce46855b2740254ab057214ad8ada16882bc74fde542e3325716. 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/QZZ662440231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b671673a0aca5d3a30fcf7c5bab6a11be77f1fae688f212117ae97f5d135236. 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/QZZ662440221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1836cc64f4672e46cc252c9a172d9fd09576f0442e919d6f51bc1fb27d154dd3. 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/QZZ662440223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04c06e40d315b26d189d2a54596b8d9b2962fb29a4c3c4072ddb3938720d55d2. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/QZZ662440224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba6728f84dd567e8f01b1e9ea5a0835ca5ebd0c5f823878437d1c4c0b814c966. 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/GBSMU8370190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x355165e02ddd9913c6ec4ab4ff3ae35611ffd0250fac2a4639d9afbc2ce882cd. 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/GBSMU8370193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fe11b7214a9b2a5e7b0ad13f728378a738013e00f23a0582c52cccd0fe8004d. 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/GBSMU8370196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc043600d0ccf48809e623b56bd95a0aafe19d139a4dfd3078a6c25cbd7846c08. 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/GBSMU8370200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97676d31e99c803b8a15cbf101e1541143e19977d65f48db66219a05cad46174. 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/GBSMU8370204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77c33ec73cc62420f62407442374954c394453783b033ba730350809584f060b. 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/GBSMU8370206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3444ac0b56b0240a9dd4a88f9471770c8217f0afa766ed0218c347f924c73ed2. 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/QZHN72071674.