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 0x3c5274f50f9e4c4c685119df94baabfb679037b77353527fa82a77ae00efc111. 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/b511e42e-b2e9-4c9b-a5ca-7a63b19b5305.json and https://artists.proofprofile.net/proofs/artist/b511e42e-b2e9-4c9b-a5ca-7a63b19b5305.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 0xfa9c59828aea87c4e9bf30dc84aa9729aaca26fd4db3fa003c606f3505e7b061. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/GBSMU6644005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3148acc11f0cd8465948d690b79c1063b04388381b14201840748d1a31380b6. Chain 2 (Bitcoin): anchored in block 958585 (2026-07-18T17:05:16Z), 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/GBSMU6644006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03f520a02b7ec46284766586522cd0a36a885e5aa4a28f241f02a036937f27f2. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/GBSMU6644007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb509cb9b778ae2170fb58867afc67a0bb0c6e1854ddf9d8b8db4b8c17afb618. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/GBSMU6701025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56284546a9d774de3d9d93637104e2df7dce6d7bee47cfecf0cf597987e5fb9a. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/GBSMU6966562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25d4d89ac8089ed04196d0d277e61919f9e080c2af42b70f30366839ae756759. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/GBSMU6966565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x755b909d1f0fdbc75481f76a0afc1a49aa815bfafec8f9b1881989ff7b00ed11. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/GBSMU6518022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84a68af3b338475cc8b160d1417a1090777a44d1ba745bfa2ea3599b77753afc. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/GBSMU6518023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5e4936d3977da266bd4dc8761857768dda4cdf65b54f7e0e269d58bf0d05d9d. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/GBSMU6518025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde7ce2c5a92b1a5a855992d3da0e1c3ce7af0ab15a51c5721149aa1c07ca301b. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T11:02:57Z), 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/GBSMU6518026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4afdc8be78a9134ffb399b40ce948bfbb3c095fe5c51be12616102ffb90e214b. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/UYMA72300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x876282b5bc6380cd5e02aa64be7fdf8000d36e40df2e40e6581e0e51c8fcc280. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T08:43:49Z), 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/UYMA72300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf73d895e440534ec3ea5e4cfeb2094d5fb70efea6f20234791ed2d575d0c74e5. 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/UYMA72300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cc6c914748583e4791c7fe698457883d2f49ab5acb35972ed69a91166b6a395. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/UYMA72300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x050098288cce471234175dd66ce065b52097524a5272cff9834da41f8c4d1fed. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/UYMA72300008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad5a00838b8de318429a4e58e1aea93e8137515db7d239063fad0e24fc048697. 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/UYMA72300011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6060255867a735c1c0d57fcb3e5c71f8f4239deef7d3928ab955adbb957d25f3. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/UYMA72300018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6563c977feac21b53a3b1e14aaf2632375daed53ccb1542f95be353edcfa5a7b. 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/UYFL32100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd83a5efe98ffa4aa1cc0428775b42fe64ce1a4ce2204523221b55bbfe44a4fe. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-22T00:03:12Z), 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/UYMA72300020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc28d69f8d61ae5d8d1fd924cfaacbb4875d6277e74da20243ec4b743d563058f. 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/UYMA72300022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c3d7a7e083b09d3e6f29fd6d9027b1591bf0f23033c7b2e3569a6b8cba94f23. 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/UYMA72300024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a4275c1b48c5f2c5103f57666fa30ff03f8c36bff31d87690404877914ae625. 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/UYMA72300025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca540944856de11e0487f47e6504c5acc9588c19d981d08f014c219b77d1fd67. 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/UYMA72300026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a33fdf3da9a5c17171f9e6941611c81b9a0235096a1e2bf74c8f75a4079d16b. 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/UYMA72300027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8501531dfba33e45a5768080317c1ff686712d6757f352b47915c1889c7534c. 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/UYMA72300028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x389784ec63ef1f96ef6666345386948df76da7925e712f306af8987c0597395d. 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/UYMA72300029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6a371cce01148318433b6497857d505547e550840697645499885284b2d1989. 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/UYMA72300030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f6e07b5c4fa66c2f176a147bd60e701c7a7d19bea47a2d4ff7503a2f099cfdf. 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/UYMA72300032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad446f2c60f5b3c5b7e124b96c321aed353c9755fec0d2e8bc38010e9c780996. 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/UYMA72400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31224a0d900540757dfebba581b9b82ec0ba1bea9b7331fca2b44a1928a31030. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T03:47:58Z), 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/UYMA72400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58825659c97809edeb8591cbca9032b848bc6690e9484342e5d3036a201250ee. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T19:26:13Z), 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/UYMA72400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ce9470f6591dfe87426baaa166fa28365aa5a86c5c883a533b06cece69f7471. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T11:32:40Z), 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/UYMA72500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86bb57a60cf8e4369d08711956c84109049c18e5c739345c7c273ac9ab9824a5. 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/UYMA72500006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8524fa78b9ac48e023bdc356eabb527acf3a10800d88e0bcdcea38b5e1f741c. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/UYMA72500007.