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 0xa2e3ab57d3652a4ccabd094a87f1d5b3505fcecb23c712eb2174a7959bda5065. 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/0e077b9d-042a-4b0f-8765-cc167ded468a.json and https://artists.proofprofile.net/proofs/artist/0e077b9d-042a-4b0f-8765-cc167ded468a.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 0x50de702422018bd299b9175dae4fac865f6602a003e8ff755637d996b74a6533. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USA371575295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bca45ca135c0f29f47307c79875df7b4423f49f947b80adbcf7a276ddce23f6. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/USA371575296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa5c8265bcbe40eac987f9106752bc3c637d7449872c181c18358675760c80df. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/USA371575302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f626deb4e14fc62aa4fc40b6777555cd11ac800f5c6e3b9e8faa63788e0e723. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/USA371575304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x207168d23f9fa0db6960c0c7fb235740c9364307128e616cc299f52505350f02. 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/USA371594807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3aac84b6609b6876fdd3458c62e1340e247f17a613a3c24760a015e86509a0cc. 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/USA371594808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84276685e9f3c6e25dbfa0b6d47cc5632d48d6ffcc2b503f05b7d1c60a711cfa. 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/USA371594809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb65853ded66e45e53364cfea330e27333c58f7657e4daf8a6789a54316f86047. 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/USA371594811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf10bbfec5007a112d4d25e5a03d45769f8a5fafe301894753ef352434535d4b. 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/USA371594812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e749ef479b30530aa6ab7368d1f655081f96ef5e80945b1e12c567dd1705125. 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/USA371594813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd0717f914632f701da50f0b573d5bbd8109c4abd336e08826c269fbc54e4188. 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/USA371594814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbc8fd8b3563cc49d8b01af188b2b8e4bdf577ae91c94c243b78d3e1f1fc3c12. 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/USA371594815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7deb3361798144f62da4185b5e666f232592c54e535a5f3848a89f9b75688af0. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/USA371594816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08ee34543768496f1734110395da75e52defe1c4988ff6e8fd4d276c8c1e424d. 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/USA371594819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf082f2f0482668187b1b747ff35f01148dff99653a06f1c902ae514b56dc8b68. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T08:43:54Z), 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/USA371594818.
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 0x1cc543fc60d447608b30b1005964dbda2a15e298003a2fb42078ba2e0e355851. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/USA371594820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4335fee786ae82d436d3d38455b150cabd780aaf3898003275400e83a2b76c9c. 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/USA371594806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x218f286cd27f32ce9548dd9dd22846da9730011883e44191127c0a84a9a4d9d8. Chain 2 (Bitcoin): anchored in block 960381 (2026-07-31T09:50:11Z), 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/USA371594810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa15b4bb57297883c9cf3362b716e00407c6bb992075d13fe5d3c96008d303ca0. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/USA371594817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb08cd5e1e36abf73ae32f3c1d4419e137d441290bd909666ceb458a292e62d5c. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/USA371594821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9a8a745fd7e3fe4b406308038c8f9b119bad0d88c1f3e8925f60d7b9393c038. 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/USA371615726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9dcb69bb16492c21468c5028f6537bc955ee6d7b10b41d36802f871c7e1916f. 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/USA371615733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9589a5fb666b48128b83bc8896f7c21bff5086e6e2eaca0c6bb1ead5423ed5c4. 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/USA371615739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd5520686408066a3a2b0582d68fb8e6536003845dece26199a5d55684c6e4dd. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/USA371615740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc917a8760975feea3c37ad5f184bf34ce94c1ca5921928066f3f6c777c7a861. 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/USA371615723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf208f767d002bc501fb6e696a5c0455f2ea5c4b9d3abec341844da569e31d9c1. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/USA371661605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d07fad117478dd9ab411f16a175efcba3517135977e54605782d622118b5cb2. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/USA371661607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72eab0384cc50e463275e857124bd4a756e930248ef2a884eb28e1e258590ce7. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QM4TX1508712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e43ac7e10952f2bedbf20b914953911d8632c73762742d66c584d7e1d9e6017. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:20:44Z), 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/QM4TX1508715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcf8e0ee05043cf1707ac71d1397f25f4fec2ab4936f16253d57fb7042d47eb6. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/QM4TX1508718.