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 0xf27b9394d87162cba34bd0778a414da5456ba3796d85865c380319e0ae19cb85. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c194535b-4b58-4595-bf1d-6dfc84295dab.json and https://artists.proofprofile.net/proofs/artist/c194535b-4b58-4595-bf1d-6dfc84295dab.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 0x045752af0a3d02abbb06d9b403990662c4e2a7e8ed2def8155c44614b9b6bc65. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZHN91929292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fc4d928950ac524339847fbfbe1563031c78e9cf4181b0198d0adc58bb04b44. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZHN91929294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x365e906fe18884cfba4abdede8ee2f6c63aaa5f3ee1bc491519445f3e3b550ae. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T21:32:22Z), 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/QZF8N2027642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d67d048d14e4fd2ece20dd901f9570655813fb2b67df1ce8ea254ce4a1e7896. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T23:03:29Z), 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/QZDA82012811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb80d64d61f765b6c6bb5a663813f883e29c6882a70e48541ea1f72e6ccf5de05. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T04:29:18Z), 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/QZHNC2014194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fe1ae7772525cc8d2b414bc5a236df314634c123a5d08c6de60357dc9fdd1ef. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T19:59:54Z), 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/QZDA52181565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x455e501a278866e3e8d453e0582d1b6268a8866e0b11b405c17849dda576821d. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T21:54:20Z), 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/QZES92122708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfa980073cf801b6bb918177ecca3105d053c76632345c5833c82cd97f008e94. 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/QZNWQ2237790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x215a27ae3ca0ea2600dad6fa004ac6ca1d7e74d000486473691439286624bb1a. 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/QZTAU2223748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2bca387175542c59680af37009e1f464b7c53a070d9319dc42b7766d913253d. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/UKZGC2300458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc81f4bf45b503ca3083b5e5fb63248b0d3cc9895db7c007de3a77385db663666. 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/UKZGC2302647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66852aec5f7a20cf236954a351d24d022a10976827c6a952c786be152322ef12. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/UKZGC2304048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb2e280ca3a1fcc1df73dca3f73aacd244eb6753315a66801b5352b44fd4b8c8. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/UKZGC2304565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61cd8c8864d32d9d8c948ca01683470aa68638ceaa0c945d328bc2d68f3ad503. 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/UKZGC2306216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ca184d30fa100fd66c6bcc68834b38f1dfcf7d80de3796134fb3947cc8128b8. 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/UKZGC2400651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ecb664635643e8ac24764a089b29d63d6b2ffdb2ea214b21f6f37bb8dffdda3. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/UKZGC2402255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91d70521d3b174b62665e4eff1cf635867f7f0db26cdc640471078291549609c. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/UKZGC2403057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23ceba257212ca59e39f2de867980cb277a26d6829caa7d4fa5f7381321ada22. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/UKZGC2406373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea3928e589f5e62902b41ca2894ec9dc31231adb5b619760f9e7bb57186db9a0. 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/UKZGC2404759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc687c1fca851c6d413d19bc634fb44f3b886cac6365b8f06ae2b34fa2243b022. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/UKZGC2404760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9917718d2210aae631de627de6c4d9ac9a106b040d6d0a5eab908e365f90082b. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/UKZGC2406374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93a06fc6bc78412ee0a777f693927d85bb7429ee977d575fb59d6fcc9b33c663. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/UKZGC2405179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc7f097e11db529d74da9b5c109e5af80eb5c1f4de01030424f51d88650310f8. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/UKZGC2405180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18da446c6f627d75eaf67c073fa137311ff4b5f5d4b54c775b1542ddebb4fd23. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:28:40Z), 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/UKZGC2406346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a06f957eeaf5e7e2ad8ec38a119eb7a085bf85ef8cb78a16c6b93911d8085d1. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T04:59:09Z), 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/UKZGC2409616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7129ccb49f5cc0a7a28dbfeb97cc287ee8b11de2b541004d1bca695cde00188f. 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/UKZGC2410732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x934afa9e1420973a807d7929cb5c852b963d59ad3ae763fe76ab997a2015c0e1. 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/SE6SA2341377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad856177f5e4bc10c58b35a34ea2321d222461272b4ed83637f9f6226dc451d1. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/SE6XX2396617.
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