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 0xf418d8dd0319ce6964afbe770ff0842d8cd9fadf510c7bb4cd8978998524e6c1. 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/ece0d9a0-3ee1-4b57-9d94-0e2ce0313ac3.json and https://artists.proofprofile.net/proofs/artist/ece0d9a0-3ee1-4b57-9d94-0e2ce0313ac3.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 0x5820b4fa10934aebbc86bd051983326b426ad5694dad9c4499e20885b347ecdf. 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/USCGH1976581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd1b8d13d69a9f317e2086256a424b8e51685be40c560860abdf4b9ed70de272. 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/USCGJ1961973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc601c43ceeda0c83dbe38cd8397e2c6270e3b36eedaf1466a08c1cc332554e8d. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:41:27Z), 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/USHM91971399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0967ddc20ecefa99628a9ab7ef2d7abfdce861ed15af1c89975a38d1511a54e7. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T12:47:27Z), 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/USL4Q1940393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9362d391c77ff108feba17386b800f60a6724c28c8b9f6a4d29710de4273578. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:49:08Z), 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/USDY42025053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb80ca800e75c78eb35d156130afd34e3308c1e3c43194b9aaaec4ae29dbdd348. 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/USDY42096667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb32d8e00250d7a6e189fe0b64a6e78c65185286f4556b8c27d75b07af8380d64. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/USHM82012912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacf3c9c1b002bb3ebe01b70560b43a8aaad23e8cbe932fe0d931f079c5531519. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/USCGH2245558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b7874a3cd2b5a010194da1e10399fd45d5b510cbd67646b446b8893c4d6f303. 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/USHM22202649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea407aab854f0d2f7f49275671cfa17e58b9ef7ae17a12d923a97faf85805dca. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:59:36Z), 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/USDY42312522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8632438c4d5c428a57dfeb1e07fb7c5fa94a1d27ae96191b01e10b71dee7de4b. 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/USHM22315484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3023154c608fe41ec42ddf7895a4eb08b340ece73565c2333b44bd931addd472. 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/USX9P2311926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb375053b23087cf2ef0ae4740cf5b6faadf643c730a0445f44af11918fc7d18. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/USCGH2436519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x463eb7c44f1f225eea6b9ddeb62feeb26e1ea56854a8185ee2595e576bfce172. 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/QZZ762459055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x109f37d2b7ef9ef860a5eb6d117135c33496d2c85d77b2dd7fd966a001c8c4ca. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/QZZ7N2491452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x508f4f7853f969a9eb937f55b63623ade958da8aba90a5632b366032acd7b0b6. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/QT3EZ2437725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb80db40f590ae09926f8501f034a40d3e40225c0b4542402cf0042f2929ac13b. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZN882425192.