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 0xdad12c5bd283e76f9ba0324ae685ab712f7f39465cb22993fdfe949e2de8e292. 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/b9ead8fc-899d-49ec-b7f5-57bc83b37e2d.json and https://artists.proofprofile.net/proofs/artist/b9ead8fc-899d-49ec-b7f5-57bc83b37e2d.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 0x7a4b1890ecb47d4613bac7bb5d462a52c0fa9caa941019b3d57f77708290f4e4. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/SE4PR1400101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6278ed0a60233ea2fe40a3dec7c8ff84b7cfb2cf0ba86baf9ae51b2b33d77097. Chain 2 (Bitcoin): anchored in block 958714 (2026-07-19T09:51:44Z), 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/SE4PR1400107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce20871d3f3ffc2d7a8b73581757282c6dc82a3d9876371187706cdbef9141c6. Chain 2 (Bitcoin): anchored in block 959103 (2026-07-22T05:56:21Z), 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/SE4PR1400108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c7e817c59681373e73dd87e14143ca81ed8f72b64addf10a791b6610880f666. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/SE4PR1400109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf31a59fb23ea1947cd4a0cbde1a42cefd4c998faf9ddc822a102486123a40c25. 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/SE4PR1900101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x549a2884075d2fb8a98ca035c25c6868c1d56cce71aeff7ec4ef6245c46f6a9d. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/SE4PR1900107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb6d229c94a3661cb4db5b14d1ea6861ff00f959dc3651a323181a8ca045a3a4. Chain 2 (Bitcoin): anchored in block 958417 (2026-07-17T12:56:50Z), 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/SEVEO2201301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93b4450376fa9e67a400c925355797279e8de9befb80d418faf0f794a45252d6. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/USX9P2085447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b72c96c156131b79cef9bd13c94d1a8243cb2fe96ee503b3870d1bd8ca9241d. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/USDY42069058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0508fd1d4c982ab519e8cb8598bebdd15719b03bb9809f0c4f64c84f9b0c2ee3. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/SEVEO2302301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe89ead7ddf8fd0e53af5fe817067ac353f8dd7c54feca9894961b877b3afb037. Chain 2 (Bitcoin): anchored in block 958095 (2026-07-15T04:30:08Z), 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/USHM82123544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e7aae4d2e3b6e596d5a198f3325d4273db0f7eb8b4d625eb85e3a5da2d5fbbb. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/SEVEO2400403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5482fe13dbe236de3e45df7ddb91f4f1876b55cbf447c9738ee2e040d727b905. Chain 2 (Bitcoin): anchored in block 957761 (2026-07-12T21:55:15Z), 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/SEVEO2500101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64ee542812ed5396d7f78205b8e1949b358f876ced18a74619633f9aac9119a9. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/SEVEO2500201.