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 0x66d326cf0bebe51c435bae7564360f5d9dd2fc356a872244c9f0807031fd419e. 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/f790316a-4101-4f34-a9a4-ab1b8bffd1ed.json and https://artists.proofprofile.net/proofs/artist/f790316a-4101-4f34-a9a4-ab1b8bffd1ed.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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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 0x66aff295160fd27a0da395a5358d0fefb85fbcdeb5a64f23bca647ce8206ef0f. 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/USA2P1394883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbae0be5d771666e50166565419b7e555e807477ef97c0e25ee4fe2d3b22ddaad. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/USA2P1394884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x222fee459f0207a44d25d2d01415e825449e8e056e6d34a8352eadd15b2787a3. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/USA2P1394886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26caa5d8c9e023f1c4744b831cf7e0a1f1ceca7555bfa1f0b3e154da1b529cc3. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/USA2P1394887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd230635d279e9680792379ed8faa29c567ada2f176eb2c92a08a98333c276d78. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/USA2P1394888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6eb7fec02d4026bf3edbafbb33c5875d94f58bb1eefc48217b5803a069cdccd. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/USA2P1394889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71fdfcfb015a73104b8dcfa92db557d8b1e6114715db22ffaf3724ad4dde5721. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/USA2P1394890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42c737def43ffea77f1832d528bc88943fcb5823b6b6116b94591ae98001279b. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/USA2P1394893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0403d3a9ebadcf95894d87877247f96d157e7bbebc29d39430f8564f807dfd7f. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/USA2P1394895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbeece5b207e792e3c1f3674d52adcf6d074fe7189029a74e2cfdfbc80a2e167. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:45:48Z), 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/USA2P1394897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa17270a22799e6405f67ea5761a25381cf704f19112bd52c0d8cdb7a69277f49. 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/USA2P1394898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x352755fa93045efe46378edc53f1426acbf146836de40a7c5ae78d4edfe2914b. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USA2P1394901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5e0ed4e03cce6d8566f9de6ded29d0223df93197778b7f03a070698e5263fb9. 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/QZNWW2014913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1407875b7de880655e8dbae3a32f4c8f615c9a9f36cc47d8442fb1751000c769. 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/QZNWW2014923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8dd7fa64aaf759b97aac6e9f5d1da6f7430e55bca772a1ca9b86d97f31f0282. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T15:25:46Z), 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/QZNWX2016892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cf9755c3463f2ad1df8c4beb2209ec0b8906570975615953257b57cbe14aa79. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/QZFYY2254787.