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 0x2f17938602f7d6802dd5c9c8f95052fa0b512f5c92e97820217c72a2a3cc1dea. 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/411510d0-b5af-4fbf-9c87-f635af507ced.json and https://artists.proofprofile.net/proofs/artist/411510d0-b5af-4fbf-9c87-f635af507ced.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 0x875bb99fa74736641b0cd54bbaeb6e8649aa59fd63405d6d16490ac696091390. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/FIUM70700995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x017273bbc838234bff2c874ed609e52d5f93a11d2ea115ad889c10fd64aa749f. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/FIUM70700996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x104aeca79f49a06ac2156f588c3dae75af390880c841c504575f8b17a2a74d6f. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T20:01:24Z), 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/FI5MD1100008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb12e81a34d00e1d3f3d64d132ecbfc0b43503fc578e85b9a3e58890b6d4e7f64. Chain 2 (Bitcoin): anchored in block 958865 (2026-07-20T13:08:50Z), 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/FI5MD1300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10ed9bfeb0ed0bdb2295cec28df8fc7921b1616c3338aaca239f6e8806fe89f7. Chain 2 (Bitcoin): anchored in block 958627 (2026-07-18T23:33:54Z), 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/FI5MD1300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24da8d3ff1c8648a5e339cc6343cfa1a213ef1298d47fa8dee3899b3730e9b80. 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/FI5MD1300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa78fd448af86ccc8d23d13f79fb3fbf7e8813762d547215ab3d4813c583b82d4. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/FI5MD1300008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cbaa80c41de88d3bebce91b1f9799bd63bdec422576240d0e61ac1cb4adad5b. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/FI5MD1900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b1ff3c075a71285d4d7ced78c1a198c36892134f7fc5fdcab3c1b70c89f205c. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QMBZ91924628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa962c1aa7bde327741e65fd5ce2196123c85913c3499fa13be5da6d868da8dc2. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/FI5MD2000002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbcc59dbf0283f9438b80463d9a10c03cdae146976e11ee6fa1a8641e48ff3cf. Chain 2 (Bitcoin): anchored in block 958756 (2026-07-19T18:58:53Z), 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/FI5MD2200012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x366b6c637eb00d590626db6e68fc34f31d4d34c1fe8826ac92cba8b4186bd076. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/FI5MD2200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe34e72ebd99e98dcf7131bc8e1c341087f649fa04e5c864c126e52ce43d18b1. Chain 2 (Bitcoin): anchored in block 958682 (2026-07-19T06:17:12Z), 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/FI5MD2000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cbaa80c41de88d3bebce91b1f9799bd63bdec422576240d0e61ac1cb4adad5b. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:30:39Z), 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/FI5MD1900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fced73db1433e08327b6d1fdffa95fbc76ffe2094caa376bfe855a500d31691. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T07:32:21Z), 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/FI5MD2200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fc6453fa58b1f263bb540c75b4de47a933f0691aed24e44a1eb896f11e69318. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/FI5MD2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f696a146e4150039c31014337d2e4f9f3e14315204eac1769228cd4e5b54006. Chain 2 (Bitcoin): anchored in block 958673 (2026-07-19T05:38:28Z), 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/FI5MD2300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8e7a42e6f46c19c7412a5e7f20bac37390ec221ec439dec0ec48e5895698e9f. 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/FI5MD2300008.