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 0xda9b9de4364629e91d6776f6e75317af1bb2bcdf77763d869f652be84fcd12f5. 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/b59a13e5-4e8f-4338-b969-a65da52d5e51.json and https://artists.proofprofile.net/proofs/artist/b59a13e5-4e8f-4338-b969-a65da52d5e51.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 0x5225aec0f629222865da95170cd8a9ee504d50e9f786f360c8d97d8006ece4ce. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/ES71G1922787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc21369f3c231c36d680c9f25ff58690b424a5dc6762d9af57a947547105ebbd0. 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/USHM82099968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb68192752ba17488fb12dfdccf118e4ee1d660848128c9bde9ec542f25ef405b. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/USL4R2062302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb6a87ad03a2201acbfda69569e1af89b0e14cad041c8dceb3df1b63690f9a9a. 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/USL4Q2005092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x024ea7ce6bfd91e743b7751a19194128bbe66846bf7c8d09aee8a6fafef62cca. Chain 2 (Bitcoin): anchored in block 956397 (2026-07-17T02:20:29Z), 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/USL4R2062308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a87ac5cd3e7d893306dd54e3ae82ff9ee19ec1fa059717bc401ce3ebba086e5. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/USCGJ2208788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1493720724e9d3b4c5f7afffe82c4060fe28da4b77fa0623b673424f8b5a8a75. 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/USCGJ2208789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7c57f3593eef2bcd6cd3bd09b94f0c43cff32f56e07da682badfdcb40e909df. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/USCGJ2208790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4b6ed867eafdbd5785cffb5bbdc08aff6907728211be3eb5cd92967302e9737. 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/USCGJ2208791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x852a1ba3c66d4bf5f2189d1e0bec9b1e9cf2edf4b88178532dfca6ec6aac764d. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/USCGJ2208792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52db81ae2154151bc958dc04f5c1e99e7c79e2cc9f8261ba2a3157079ce0c153. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T15:31:18Z), 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/USCGJ2208795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93e24d349152d514afabd366a6b830d0b9a205c2e212b5e2cd31b0f65f31253f. 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/USHM22296084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82602149388d25ebaa93f0910ca4ef0898efc7822e7366b98f72155eac308da8. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/ES71G2415931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82602149388d25ebaa93f0910ca4ef0898efc7822e7366b98f72155eac308da8. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T09:57:14Z), 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/ES71G2415931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x786930bbac7f8b8a7d16f88159de661d021acb34a57b40ab12ec000c062dd1bc. 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/ES71G2419419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5473b69b7b8698293971530788c32d3593c99c71a3f682a9c67069d56e2787e5. 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/ES71G2507189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77df1161d380d4cb6a187f8f389357f3d02484e88597cac7b33ee5919ba27150. Chain 2 (Bitcoin): anchored in block 957842 (2026-07-13T10:08:30Z), 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/ES71G2507190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ce2081b8fe19cf6755d33d3d05ea1764cfa6a4a47ed8edc0ce567170927b79b. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/ES71G2507186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc59bb9207e11c5ab67035a9330482c27f3462c59934804747805ab4452d15255. 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/ES71G2507185.