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 0x9ad8d03d1b68beab37ce72cde0bfcfdedd7e9e61e88a2fa576f419d0bd12597a. 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/a1ce32fa-b6ee-4b4f-ac36-9f4d9b557d02.json and https://artists.proofprofile.net/proofs/artist/a1ce32fa-b6ee-4b4f-ac36-9f4d9b557d02.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1af4809d954fbb18aa94676bdeb51a6dbfa226046a0819ce9be98a3529aa854. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/USJE61301594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ad8cf2d6e1c91e57c327e08343c5ff17da17880d94876ec05282b1bdbfefacd. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/USJE61301595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ef83bedeb81bb9296f9c4c8ec607b8fa142db492cf0fc47ce54f553be2673fe. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T18:01:49Z), 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/USJE61301599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08889191d3b0a6859885f07f21b58fdd160724f697ee6c89b1d5ebb66b6a8526. 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/USJE61301601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77bfa830f4ec3bf80c5f3deb70db45b5e9d046bd9e212a129c7225a5951ed0e4. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/USJE61301602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16a582f5822ebfa291b3c5fa9721c9abd11a74b73c70bb082ebe0023e19a5553. 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/USJE61301603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdd1780c2c7c316add365c87556e2ccfb8b7641e930f15c540d7ecf6622e95c1. 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/USJE61301604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40077d09e923d134e180aca5accb66653eefe41cfa29854ef5cb8f74bbc41175. 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/USDY41613712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2072351d7379eb1d6f373abbfa517eff91eb83c69c57555525ec231da98ed98d. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T16:06:54Z), 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/USDY41613713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32546e91cbb06adb25dd600ca085e874e9f27b74df932d5f6b592179c4faae11. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/USHM21284035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c82f6294d76a9c8d7c6848567a405b86c96eb125293f7e1a5c83914170affa7. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/USHM21284037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23079c30d9630e041a7ef421a1f52facab31de0182a93893661ef8036a3a6c86. 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/USCGJ1364240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe26ba2609d217f4b336b0186440004c748786f3e230d9b2c9e1c5b5925aceb1c. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/USCGJ1364241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3439c024ff853beed8ae9eb3ed1df45a8c8b756ae004e96efa6d0e5444a14fd. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T11:01:36Z), 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/USCGJ1364242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb530ba14007536fbd055c490fab46800a637a5a9bc26c257934fd4ecaffa762. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:41:04Z), 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/USCGJ1364245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x054e61781fea37c5bcbc6b736215aa4b2ec4c8d10e913df46d5724594f6ef9d1. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/USCGJ1364248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24422bf1cd94df0c31917a1367a23fa084e491345f2a4de2fa47c95c335ebe0b. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/USDY41515020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80ce3ac7b3ff8e5831a6ca5aa927184cee777681755fb79e800e8261be6e11de. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/USL4R2027315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31e3104e95040c80994fbf68cdb9a7fce92c7a194efbad06c1d0d7a3290bac99. 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/USHM22396954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8caddc7d8ef8a7967f114f7169bace7201a3a053f523d095c826fff4e098a96f. 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/USHM81293686.