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 0xbe66840116a62f69eb7767cc3ddbffe038b06fc28c9aa043cc3cf87332122140. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/912df87e-27c2-4bd1-8570-46e2e9943b94.json and https://artists.proofprofile.net/proofs/artist/912df87e-27c2-4bd1-8570-46e2e9943b94.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 0x6a8c49649c15e0360f18c8274af0c80e858728d5778aaa63d02c654df5363896. 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/QZTVM2295808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3df7df38a45191b371e241febb90cb4fda041ad49451076edcda5f8f00ad972a. 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/QZTVM2295809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb74e2bb503ccfa70956d9cd6d312d9d7df3246996806ad3bac1d05e4ddb9dd5d. 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/QZTVM2295814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeda41a80bea06c8706d718ae930d33ee3067cb430716ed4d19212a9e4bdcc0e0. 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/QZTVM2295817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8eb5536fbf23c535d2f8696c40d0950c7489fa9614216770f7514cfe6ab006d9. 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/QZTVM2295818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac3a72be068246eed743913672d576d85e2554cc281213fa514f27e91fd6f73e. 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/QZTVM2295820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44e5dcfa54a0464a704ed7fb0c149dbdaf641b9f152c2cc887e282b084b28e3e. Chain 2 (Bitcoin): anchored in block 960407 (2026-07-31T13:26:30Z), 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/QZTVM2295807.
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 0x4a9413efbfc33304dc97e8433d88d0e3c153df2ef4cce7cadb9f13cd139cd881. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/QZTVM2295810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb56018ecdfcee7b476f78cc86e6c4ebd27ec286872c54c97cb6b3136656b12fd. 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/QZTVM2295813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdec460eeede363699dceedb507eaefb9899a98f3cef92433b929998a81ed7a6. 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/QZTVM2295816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc249d3920dcf7cafc2da993005dfae0009045b3ea052868b89ea23e83e146056. 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/ZAXH62100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd000eaaf0af89654f512783b9ca2cd82077c9d94b1c1d00653d3d0e4c83e4082. 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/ZAXH62100006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5fc903ad259539cb5c5d521e95b31219b1dfe74f09a1468279ff76cc916595d. 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/ZAXH62100009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13edc6763db1eb028e3383bfeca7c0b8328026da07d159e4da777c3e0697b4c3. 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/ZAXH62100011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4227e158b3c125443b64fe2980d8d483a51ac40e7efce988cb5ea938a49a5072. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/ZAXH62100015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ceb655dbc29064d96bc34dcc5f3010a09f8c386a1c6361f7a9e744e32c48ab1. 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/ZABP91700013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65418d7867bfc28e1bab9dac368f06a62d86592ac9ee5e0a49a53aa30c650f73. 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/ZAXH61700011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38a80e7ec6b8903e29f041a1e23048909eca08b28889746d1ccc0de4c11a372c. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/ZAXH60900005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7b214885840173065bc0c300ba8322d2ff775d4396c34fe969c35b506bea7b3. 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/ZAXH61800002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e4353d1d5fab97401dd37b45d254d39f4433a83ca82c7f3ea50a8d080467eee. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/ZAXH61700010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8043bf4d29cd92e990aab419e8189a7ccf09bd78aeb4508efd9d4de2c9d47cc1. 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/QZGLS2470780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcece8073c2440f0bfe5ddfec4f7b8a026927bffd13da430c14955aeb0588b3f0. 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/QZNJZ2492791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb387dc95862478879f23c244e8184cab78ec18a163d61f994d9424ba87da849. 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/QZNJZ2492792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf98088ed160bab053e89bdc986bc651be843eb014af63ddb3df6b23ddba920b. 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/QZNJZ2492800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd015ba0d29d552a693272c8db7ec7be25dad6ca2d7fe0469717a31a2a5428269. Chain 2 (Bitcoin): anchored in block 960330 (2026-07-31T00:58:21Z), 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/QZNJZ2492793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6de3bf2c5ff925c929d9d3032ed758ea8c1e9a2961d0c074ae6a671cbe31425. 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/QZNJZ2492794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeff3b7ba63162a90011021590db9c1617259befec0ee740319895e7b36bfecd4. Chain 2 (Bitcoin): anchored in block 960339 (2026-07-31T03:13:37Z), 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/QZNJZ2492797.