thumb|Timber framed with siding of vertical boards was typical in early New England. The traditional color is the result of iron oxide stain applied to protect the wood from UV damage. thumb|The Texas
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 0xd0035d19419f590e99af2a528acd2d6516382031056568c4e159eb50dde830ed. Chain 2 (Bitcoin): anchored in block 953684 (2026-06-14T19:51:57Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/64b40468-4149-44de-8455-c649a8c4a270.json and https://artists.proofprofile.net/proofs/artist/64b40468-4149-44de-8455-c649a8c4a270.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 0xd6ae4a846963e22353aa0174f22f61dcc2a4af9e87dabfdd3ff7edd00f3b84cd. 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/SE37J1504496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f8138cbe13f653f2739e49bee9b0396194be2e01ed1bc5bc085b82fb778a1e9. 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/SE37J1504338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ca36c96ba9c4dada0e79f266a84046db91393ead97ec2e853bf1399270313d3. 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/SE37J1504500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca0310dc784a451a4d7483e96d21be4a71229ee86500d76eefd8eec3e5e580ff. 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/SE37J1504498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08e7c9c78a3a3437e7be2379a79eb6a2163af1e572fc11ff542c4a6b6fd26fac. 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/SE37J1504490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65f0e7e945c646e39eb13a69dbb82b8cbbbd1733551ba02e9f0b65569b27a42c. 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/SE37J1504495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf84db3e25f657e6330d1bd8c834c900f2823a65f00f8d1fd96ddcd4dcb0047de. 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/SE37J1504497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fa485a2180ad23f23d24633630dc404faca95ac76b9476245a8821204909eae. 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/SE37J1504492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34b746e2c7bf2c256af777ff8e05eb9858556f57d9f3ab8db9e970f4cb0fa6cd. 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/SE37J1504335.
Världens bästa Karlsson - (Från "Karlsson på taket")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a9c1bcf0313f77f08cfeba3620d8bad0944780a14def142853e6e99881f5fa0. 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/SE37J1504501.
Ge mej mera köttbullar (Från "Madicken")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x471d5d035d9cb0d33f77e77a1821fc6f24794efffd21268873559dc8a817035c. 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/SE37J1504491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa74e5dbbf875f0130135a86875d58be8474a9b8fe14b1b13a45e13560acaaf6. 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/SE37J1504494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd769b85c7922edb28d047d28a5e574a5cbb903a2cb5f1691a51abe0e51bee7c3. 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/SE37J1504354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb09423dc09e35a1b6a561b2121569c29782f966c412fdd7059b3564a1326da3. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/SE37J1504356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bf60a91f6e337efb3af7357794920094b1ccd04b2664b2210496f798e598d3e. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/SE37J1504499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97a0429798a996234daa17d54e44df1ae61c241be3f5e7d179ddde5e34bb2ed8. 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/SE37J1504502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38f9057a0b1db07419505f94e68e5779b387b98fb7924fcacca05533b9141493. 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/SE37J1504339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x301aad4f2da2546ced72d2757059952b4fb683cb2089eb5b1e7d4b3657c1a767. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/USHM21692038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x652ef9404dcaaddc5d5f8fe408fe718738aab2611c0fb7ab973d832fd104bc6f. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T05:02:52Z), 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/USHM21692039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda38f48f228852af8b5a0fb24c623c87267913c95e2c72988a578f3883bd83b5. 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/USHM21692059.