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 0x4fbb4484e3c8da1f3f1de6f0dea03fdee8f2cabc8fafdb321f61f01204e98856. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e359f984-6ba4-4cae-a3e9-50b9d3ea1ada.json and https://artists.proofprofile.net/proofs/artist/e359f984-6ba4-4cae-a3e9-50b9d3ea1ada.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 0x2dfcd1a3589ac35223bf90e44e7b32856818188979678894bbef9d6d2cefe6ee. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZTAS2219832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x348639fadd0830cbee61a334b0b2dbdd31ce328820e47df81c3eb0911740a876. 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/QZTAU2294856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5dd8f010f55def7cd996660efbec1d18f6d71612d0f6776184ce611c7606b37. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T15:07:00Z), 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/QZTAU2294857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x894482792b5b391b11a1ed1745d23d36865e05b8ebb462710d8937cb2f96ce8b. Chain 2 (Bitcoin): anchored in block 959018 (2026-07-21T16:59:04Z), 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/QZTAU2294860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1d8bad6b9fbc53f1f861c58bd26348404c44cd46eb827e4765a242b9a9b6c9f. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZTAU2294861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ca297cb269576f728d877dd0217d4a8d677e987b1f2e84b173e49c554a401ca. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-22T00:16:06Z), 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/QZTAU2294863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae0190c228d0bcfc377365dc2b7ae82b70d9105b62e6376c6f583a9a2d64868a. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZPLS2313869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x308e242945c817439fb8de3b56a613713e10ca74b6f882e9cdb698e28ad59b66. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZTB32382060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62d4d4801da468440a24a9032847f276f1e4f7389075825c415a9d0ba8a8d8c7. Chain 2 (Bitcoin): anchored in block 958691 (2026-07-19T07:19:31Z), 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/QZTB32382061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35ed3ec3b9c7cc508ff6e6613ae943103e20d2fc1f9a223bad090ba7a8df5186. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/QZTB32382065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa139c90fee24fedc591c40d348f0e2efcdd36815ce410f1604ad3c9223ba4958. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/QZK6H2485548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13ba835060b9c8faf4fec5e53ef91e7c7385d2aeacd23a2ac03a2bacb4a6b835. 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/QZK6H2485559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77598bb1823853948c95dbdaf723f6d51f755f82c7a9dbc808cea7b2fd932391. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/QZTB22433841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x077a98c76e6b857c9dd2088e1c0c1ab98c773a61f333b93b23c7cb94c23070b7. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QZTB62427303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36aba4043a2983f6742b598c52835f7574f1bca69c681902c47424af9a5858fa. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/QZTB62448440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadfd6c4bd0147b450c3621b3ec9d27fd82c614a291e07ca4bd1fc7b69d7d80a3. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/QZTB62485562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa433b3961da57b82f3d2459a405678f75c2487627dffcbffb5cbb60341384b8e. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/QZTB62485564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x854566f110d76dfbb7d1ae95eef81e51a7c555c61857e0634bfd20d59af158f8. 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/QZTB62485565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x499ae08a2c83d56b6a61665a7e04e4d51b4bfa50adf9e915120fd096251fe241. Chain 2 (Bitcoin): anchored in block 958487 (2026-07-18T03:43:59Z), 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/QZTB62485567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82bb37ac8b80e8b9c286bc32485728464e4f4cfeae26181146f64f66fdd37aa0. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZTB62485568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab1455605b12a820579b3a380e7a1c24601582b16b5d09c445ab80cc58e2e32d. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/QZZ7U2409992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48607adc9af79d5ca0b7d38f0d5071fc85bd7fe10de9515960689af6c8ee274d. Chain 2 (Bitcoin): anchored in block 957778 (2026-07-13T00:08:48Z), 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/QZTB52539038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa24b581c644df143e29d638895f713d99865129156c3cf0cfd11f5bf0cc619ec. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZTAZ2545763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7655f845c4d4965fd46a08a79cddcf9003a3ccb5f3d8a392a863cd7f0b050980. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZZ762566265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69eaa532406aedce6cc54cb1b9ebc2adeeee7825b494835e74036a5892fdf4f6. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-21T17:35:46Z), 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/QZS7J2302221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdde3bf8c164a4b3ac70283402a78cb373c56ae75d4340a9a07e9274b55246735. 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/QZS7J2398976.
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