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 0x206b31fc0e92ffd7b32083be27f58401f957c5037def3afb9ed519b4d5b77263. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/376ae798-4693-49ab-a71a-95bcb578dc91.json and https://artists.proofprofile.net/proofs/artist/376ae798-4693-49ab-a71a-95bcb578dc91.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 0xf1055bef6623014a80efd0b67c0b2879d8b94fd893b25c0e46b8c75d4bb0c902. 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/QZWFH2463859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f57a7fe78b2ab5e1bf621af36513c3c8154329fd344249120ea4d916c3b73b0. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T21:34:21Z), 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/QZWFH2463860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde50cd47115e7b40c7353336af3bd63ce3ae8694dc836654281e75ee31a4a2fa. 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/QZWFH2463861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1be79327ea6c805c87e1947cea2d9b052f0c78dc0f44a37f59c00fa405225fa0. Chain 2 (Bitcoin): anchored in block 958947 (2026-07-21T00:53:33Z), 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/QZWFH2463862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x756a6b6eee7abe8d4fd704f8dc2e1ad8cbfeba0881e1f01e40acafccea221645. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T19:26:13Z), 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/QZWFH2463863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb64807aa2dd6b99d874aa5fbf99c396364d1e06039b78595b5a411e45025ad00. 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/QZWFH2463865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3669591daa0e74f6d4edbbdde658d1f135a9ca6adca81650205f4c8219aa572b. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/QZWFH2463866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7211b1296bfe8bc99302ab3521fe1b7b3e510e134dd1c1adce23e48f751d456c. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZWFH2463867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cb922ee0ab589230069505455682ce389238e7012efe5f6d1a1940b7945e3b4. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/QZWFK2412018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x162262e4c35a50e6e3a865baea904e0e03c87924d41bb29e5d1988e71cec227b. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/QZZ7N2450481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee65aa068625fef7cd68f9bb7f14e534441904a9d42db8246f13614d4ce6cea7. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/QZZ7N2461896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce28bc76308c21096c2b2f99e5f776e447ed8385abead9dae18f2f46e4dce9ac. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/QZZ7Q2435726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86aa012651f942eb86880e06c33fb977c6751025278f6e3d5bdd8f59c44ac13a. 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/QZZ7U2484968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a84afedf47898af341da81d85a40bd7a653c271468b985cd0afda2ee37ea9dd. 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/QZZ7U2484969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccba32d69fe034e712329ed0c18a260a4a0e850f1facc4617ae53701ddfc9371. 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/QZZ7U2484970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bbe3718526c3edeaec1e68f25b47052b5c74b12ebb50e8bc6010b8a8dec0ef7. 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/QZZ7U2484972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7ec91e58234dd91b33b2564beddf57ba87b37a996e5febf706c6b264cbec137. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/QZZ7U2484973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a9426dc421a14f85d5a411696d09a81eed04b35fe15c16ca2b2edcca15c9a5b. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/QZZ7U2484974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd8ef287c56342cdcf5a71ad4463df266057e45835f3c8433bf93cdf10072dd4. Chain 2 (Bitcoin): anchored in block 959018 (2026-07-21T14:12:28Z), 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/QZZ7U2484975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd72a7e937a413b270eb3cf002454ca8a89fe850a2325eaf9e737e4a3cbaa64d. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/QT3F32414772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8898eb9f5e3056382c3ef2cda6f64555b9ea80a86e999506d4ebd685fad3ea49. 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/QZDA82508547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x772f55e2514fa625182105ce448e5c7e578f74d97282c4564aecf4d8cf7fb7de. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/QZHN52592913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe7ef619a4a48767ba13f8d128780613bccf27241b41c906ffecf6ff711a6a58. 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/QZNWR2546035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe283e1eb3f454ac8668fe16d890cda7dd13b4f3d74a203d6fdbc4bee6ed991ea. 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/QZZ792520127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ccbca86873ff9a4ef93e60596ebc42306a530bc7fb236a13204ff078005ac7e. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/QZZ7V2511660.