REDIRECT Persistent uniform resource locator
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 0x1e5f5eb307ea18763b30e8f0a6b321680d11ee3a22ed6a2ff2ac6eea1eafc7f5. 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/b4c1813e-bd23-43ec-a70d-a2944ffed0c3.json and https://artists.proofprofile.net/proofs/artist/b4c1813e-bd23-43ec-a70d-a2944ffed0c3.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 0xfd75501fa0f2bab29be5f2e1f986be696494cd25883c9652bdcd3e0453677358. 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/QZHN51905411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42a697660f1962bae4edfd59b0054dde8eb11c4c1832653f5ae39e8e585b3423. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZHN51905412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cc103c71c074f526d6454f5ac16dd1fe46a22a3d805a2c46f89166ff39ca3f4. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/QZHN51905414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ced95288fea124d6d4dea3e2e170bf8abe05a554e397266841def3f6461c82a. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/QZHN51905416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58882cc534533bd831ee2ccc68d15338de7b2b311edb6a4a78ec60e845acc4d5. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/QZHN51905417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde71067005c21ad70a4247db4a1744b107d5d648c8fdd37203ae01819b3ea412. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/QZHN51905419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x911f1fe09e263d7ed8a9e873421eda1da4e1e08cd59658c49964002287bcf011. 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/QZHN51905420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedda1dc7f5c9d7cc1f8ded36e426e78c847f5cacf67e2b7a1746439ae188bda5. 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/QZHN51905421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x225097828c7bba89efa96ca64498fc910ffaabce1cd678b1e72693d149530bef. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/TCAHD2307006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0be9aefc600eda3bd8df523d23173c412c1880a87a2fa112cc058dcb31e0cab. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/GBKQU1718678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35d1a3d2238e777b17ff50d382cdbcbe6e5ef02c3d68a9fe5969a88cb0186003. 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/USHM91640013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x284b3a84d4b53ca6651ac9c47b22c723c331002b01a84703db5a70b982ecc6db. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/SE6XW2303240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fd525179b8352073687b85c9d9e10d853a8846f017cce459650e1cf05fed0c5. 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/SE6QE2378778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x008cce0361f9f42a07cfc652ff894d0eee4ef92b9d7679e0eb3e1923a2259677. 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/SE6TI2354614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c052cc0d41d5be99cd423e54b3d4ad4ca20a4267b5c757bbafbc03a07386514. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/SE6XW2377536.