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 0x63e9a5330b31c458d6e18d7c6b34a4a0cbe6f79456c8fe745124d461c22565fd. 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/be58376c-4d33-4146-a6ab-a801e6ecefdb.json and https://artists.proofprofile.net/proofs/artist/be58376c-4d33-4146-a6ab-a801e6ecefdb.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 0x9ae4ce8913f689658e88fd6f8297659084eda46b815ac2281cf76ee105ac3e01. 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/GXH2J2521432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2803bc648c9c34195c46db80e0535355c311131d3dbbbcd73d1b78568770716d. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/GXH2J2521433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b1cfd48da69599f6fb9ceb9244ef680e9b5df84b9af63fa754e21907bb02a2b. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T16:17:58Z), 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/GXH2J2521434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1620fb98a596c2a74ca561e4cf7aa834ebced74c9a169e4b630a7b2f5226e64. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/GXH2J2521435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e7b7c5c5dfafa2bd8284293c9bb4743cc488f7a9af0cb23f602a20f5e117675. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/GXH2J2521436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3a38bbf36a20d1f5cc417c896d611ac835fdef127bbaf05311da6ff92b3e482. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/GXH2J2521437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba07245b849efb6ba28b94f777c5c6934c540c6107d758d3acd52a001dbd4e8d. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/GXH2J2521438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19d01436ab805191bfb8a83c693c2bedf33710100f36e2ad498e9bd3eb72677d. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/GXH2J2521439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76ffe303b7f644c8bc3b70853cbba6ff808a527ad2a75aa6133a5932805105f7. Chain 2 (Bitcoin): anchored in block 956859 (2026-07-06T01:42:12Z), 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/GXH2J2521440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e765417647bda6d216fe2c8c8f5d7f2b6555889e138b320d2a8841c15941d3d. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/GXH2J2521441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5a335a0d2b503ab2bb0cc704fa8037e448a139bcfa80982372377775cc82d23. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/GXH2J2521443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4658eecae7f07df98c54e194d03797f1cd20f62e56fff5997d50c01dd1afae9f. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/GXH2J2521444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76add6494e6d5688f7a9e68eee424a248f6b534774f977c4f77a711f9a31d923. Chain 2 (Bitcoin): anchored in block 959145 (2026-07-22T15:39:05Z), 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/GXH2J2521445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e7e18808357eab6a4f5364fac2446fc90ce4c6b2072582e4cd545b8669620ce. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/GXH2J2521446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f61ace3010b5a7cc1df73ba32f053ec0bcda9da72fdb1b9f8d0abfadaa62647. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/GXH2J2521447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76958c8d064c96e57b1395513ece15ef0b29e60773957937fe873bbcde1f8444. Chain 2 (Bitcoin): anchored in block 958432 (2026-07-17T15:43:17Z), 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/GXH2J2521448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ecd88690fee20c6c3b07f6f014d2b99bdcdae87b77e41ca078bd1acbebe83a8. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/GXH2J2521449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1a4431e071c8614ff076f562e930f533bbad5c943c3b349304b7c2b83c7f7ec. Chain 2 (Bitcoin): anchored in block 958432 (2026-07-17T15:43:17Z), 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/GXH2J2521451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf13b14a1bcf08dd8c7db5b1f6b329ece6f5be8c05ad8c123da710f4a4443885f. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/GXHUT2515028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32af95ff3889f23f2d4a1a5eecc7965c9c325a8207543a1d26d2e844730673c7. 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/GXHUT2515029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaba7ab3d04d636288966c8e0946296d2152ce4244e4896b4f52cbf309a56254. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/GXHUT2515030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccc19766b61086d3ee4ab5a6afec4a1ab1dc3e337955ae916de8f82c395e2b46. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/GXHUT2515031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d52aac5710040ab112ab7947132186cafc5bc623d74ff6adf4b0679d51178b9. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/GXHUT2515032.