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 0x01d0dfb2e0d76c88b6bddbe92e77eeb196798a21d3d8737f0aa4bef71ac160f3. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/69a0e91a-9db7-472a-8ce8-c9e36b352292.json and https://artists.proofprofile.net/proofs/artist/69a0e91a-9db7-472a-8ce8-c9e36b352292.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 0xd707c0fdbc9bf64963795bccc2098ca207fefe8d5061f3fe3a219bc23f7a046f. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/USL4Q0740792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83c08f5a1ccd65dd19b973f77a35f65d1dc95d96fabed18829224af16319983e. Chain 2 (Bitcoin): anchored in block 960259 (2026-07-30T12:51:24Z), 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/USHM90514327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9056a53e0d953af79ee6ac3a88d4e64eb3edd1ffa111a81272cced76f4e427f8. 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/USHM90514332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4073db73de8ed8cf92304be1054ad6ba82c9d9604b4c1c5d6204197e186cd8bf. 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/USTC00984060.
Lo Mejor de Lo Mejor de Epocas Musicales
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37aec7f72f6373d26d4fe4accab1d1b436b10a03c9986c54f9062a51f98ed044. Chain 2 (Bitcoin): anchored in block 959145 (2026-07-22T15:39:05Z), 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/USJ3V1892839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95f9de3dbb12ca19185bbaec90ed7903be414c2c7ce0bf7c3d1b23c6b9fcf4d2. 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/USJ3V1892840.
Los Estrellas de Piedras Negras de Arturo Lira
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3617ec9b9b6234bc4d5f741a61b95dd5c3f30c4565b79e348a5559a02a6b5a86. 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/USJ3V1892844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3f40af263ed460c17d3210037851ff80bcc15a1bbc929db2950713e624cb6de. 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/USJ3V1892845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecfc31d0cafc589aae3c7a235e18ba7a6be0cb33179ffd64e2e910ed529798c9. 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/USJ3V1892846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc45cf162abdaf1cd71672640fb1cf51500e49f9588487019484edd0513b6d73b. Chain 2 (Bitcoin): anchored in block 960198 (2026-07-30T02:21:55Z), 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/USJ3V1892847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x517b016ea55ec1459639be0fcccfa4e424fd606e4b17eeda0e3302c1db83c587. 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/USJ3V1892850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a9d396785ba2da3759a5af26209b2a5907cf38417ddbf5701fc220fe1877855. 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/USJ3V1892855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6980d2cd2004eaa8b1246b92dbc70b3b28ecc2f3f09a802e3280a0ed2c046b34. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USJ3V1892856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd9e730a1c81a60e0b5be33cb5128a8b02ef583fc14c1d9d981e066ef723ac06. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/USJ3V1892857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6be720594343dd2d10f6309735a4d93bf88f5cebaf6d028e6e71d9350cb1ba1e. 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/USJ3V1892858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x514ce8d14b28d764515092d604fcd05a7f666e7486c56cdaa9776c699e2bb409. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/USJ3V1892861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1751a570a244240c8cba66785f610cc41a413a19d41fec93cd0b06c457730d05. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/USJ3V1886653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c87cc8d79fa8587d9c9ea5d73d5cda549abb5cff9885d7f66fd3908c67d2678. 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/USJ3V1886654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x490552e0ca1d0b640966f0437acf81cca8177715a6375c62ea069606302159c1. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/USJ3V1886660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf412cbcc019cc91760183e2fb0e5f89c0f31f9f4f8acf32d29e449352c2b4fc2. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/USJ3V1886664.