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 0x440e205305da14e506767be4c4e8f04a5d46a04eefd32a72974a9729b8d1203c. Chain 2 (Bitcoin): anchored in block 953598 (2026-06-14T06:40:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0c26486e-481e-4ff9-87fc-b3367153820a.json and https://artists.proofprofile.net/proofs/artist/0c26486e-481e-4ff9-87fc-b3367153820a.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 0xe5f5a6fd97dc08587c4708681a3172910f10e2a408b752e205816a1b0eadd36e. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QZTAY2423552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbea4a7b942686916baf31951428e2b7a5a663f0be5165f1836686037740e5634. 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/QZK6Q2409297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7600d8e0f5b6110f63e263f4df99ddb96a62ade57b754950e348df373f86639. 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/QZK6K2349282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd815cb49225475f3fa4d730d1cbf6e2f78bfb4c76654956d3f36c2f1814fb358. 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/QZK6J2303848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc02fb9f49064b123119fe187f398f1af2ff916b0d0ac528192ccdcb693169077. Chain 2 (Bitcoin): anchored in block 960179 (2026-07-30T00:39:11Z), 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/QZNWV2233613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6421f2ccdc72e4a4d479191c45fa8a27f1157d283128b85dbb89556bdc6d9a59. 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/QZNWV2235746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d975eeeb4af576435686a138405ef878bfcae8da5d5f3b486e9e2c2dac583fb. 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/QZNWU2235382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92689c21f8d9562c9c9d3918adf6891415411843a97d3fbfc6a72ec0103a753a. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T18:47:29Z), 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/QZK6F2118663.
Toeshey Zepai Lhamo Bhuti (Tibetan song)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a7bef199cbb7580596362e03a84cebf73e2fc1b35a25017244098448b0413b1. 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/QZHNA2138840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3631bf5b903321af5188730b50eb3c1d58abe861dd18086bbf379e0074a6d129. 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/QZHNA2124871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8439c69a6cf97671b3c121e12788cd768f29f1bb1e326b930ed42dc055143e9. 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/QZHNA2122980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb8630b7cfac4a0961f10d0de962d5891931dcdc1e8ffbb0b6ab420e8cae562b. 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/QZHN92146500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62ec42a7532f7b4d4ef0bc67c9afd77aca9ce2a17eb04a4e2029e80ccdbec2db. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/QZHN92147099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29e30664613a2ba7b2ad6e63539b7e3a95bc8a90db757d6b3006d24f124b8aec. 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/QZHN92143323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1ef398a7dfd19e64444b321ef6c6344a0e4e9cdc7c12777144d5b85ca92fa90. 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/QZHN92103415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4303b6803627d3d50bcb9eea982466c73d6a93299af4378ffcbb0d802649b83. 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/QZHN82188305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c200431b9cdcce88b79e945a32dca01dd01dd21aa656f2696511b7e0e7035fe. 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/QZHN82169463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25104e11d3dd8cb229c35d18c203609abe82bf82165ab18dc1ba4d6e51bd3773. 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/QZHN82150714.