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 0x8095c5ecfe4fdb60e4c335d4ee737576c983fcc51f4e03b9defcf867708a5d6c. Chain 2 (Bitcoin): anchored in block 953765 (2026-06-15T08:55:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bae8966f-2995-4e5d-b3d9-73b8442165f4.json and https://artists.proofprofile.net/proofs/artist/bae8966f-2995-4e5d-b3d9-73b8442165f4.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 0x308ad80be2fe1defaa0cd1d7d7c329d8c936b93c8f46b87832064ceb64fd2558. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/QZNMZ2328149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74f553ded7c9166e6a56fbc79918f03bb8325fdb88c615a2fa1e5fcfe2f1b0e2. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZLL92427780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3941d97fb1632b33efc9becf349811a339b0e9b44f075260a15120301e55f48. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/QZLL92429935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb907c2c7009989c398d1528b5deaf2335a25196145a532c0fbb11adc820288f. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-02T22:05:07Z), 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/QZLL92429936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06078fe11217d6b5ce307dfb7a667caf5561a0fc9ea3c9b6cba385be73353124. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/QZLL92459847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7d2e9942ddfaab76580f9c9f8be0ac9d7031903d59ec9b7a79b4a7fa93f28ce. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZNB82422543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35df905fdb982434521c44094bcfbafcddc46702184891b594bfb18ec3c71fe2. 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/QZNMV2420874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ab9658e4a61dfe0c52ebf0a9b94afed9946c343db80ff016cb66722bdcd3799. Chain 2 (Bitcoin): anchored in block 958407 (2026-07-17T12:08:48Z), 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/QZNMV2435970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x055100192e444d6bf0902571b89c89c72b1f5da8ba5ec333905227bd6d150308. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QZL382532588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x051cbe2fea3672a1c40e4fc171eaa87df5ee7c6cc626132c7f357c3e66a92fe0. 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/QZL382532587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb020037f64472e86e1918bb97c4005f60bb55dca7df2087b3c8f5897fc3d0e7. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZL382542635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8454455d17c32908c8210a8812e9d17e4bc0c5f14d0a2a60af4a0c2417db3f98. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/QZL382554401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc73b2fb310afb37914ee45edae39441003318c8b2163adc58292be69bcb5d230. Chain 2 (Bitcoin): anchored in block 956859 (2026-07-06T01:42:12Z), 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/QZLL92531951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x686650f6d44d8f112960518f2167e1abe5f71f58530913302facd266535c38ab. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T21:34:21Z), 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/QZLL92542534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5783d57b52359b5986be43734bfb6289bd30d7d8df8c61eaa898ba2f05db777. 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/QZMWW2590981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0b29fd22343ee4ccf21477b3a541f96f96a08274e6497150fe924fed3ac72c9. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZNB82501678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c6be5eb7be1b2b168b49efd249d7df72b71d05086b48c491eeb64bd2ef935c9. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZNB82528548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3d8f4cc705c9e1f29d7197d36284d4aac81092e09cba71d1a012f0435b80233. 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/QZNB82588816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadf0fb67dc8ff61fc74092f9ee447856e1cc569329a723e57098fb90a1ff04eb. 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/QZNB82599615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d698bbdd790d06c30440e66fa7386783eda9937628b9c4dc0e93bf99a2c8020. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/QZNB82599590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x473a4c922c6761c0aa90334e086799ad9da10c5c0fe861f0c85dada24650bcb2. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T05:02:52Z), 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/QZNMT2571258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x671fbda4a6690eeb781252d490383578956ac3ddb1895afcfb20c59157130624. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZNMT2593182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91f0694357e1cb9e9f471b37c391438c749c97465666b41fce0a522b5095e06c. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QZNMU2525123.