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 0xcf30f6fc733f0dc20c8021dbc2f576d9f2a12526eab5a1607734838f8a237a70. 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/08476afc-16f9-4e8b-8291-d60daf5e0e76.json and https://artists.proofprofile.net/proofs/artist/08476afc-16f9-4e8b-8291-d60daf5e0e76.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 0xe8845da56bd841a52d410193ca484359ee0a654b0515e9740c1b95f41eca6c09. 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/USHM21361882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f1d2728627b831e57f86304e0754eaf41ba99b9a53f605d486aeb28001dc0a4. 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/USHM21361888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58842b0dfb179a94f31d62af563c75ccd5b89e790c9e4eef3f27d632e5d9f467. 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/ES8191200480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfbbc247155f865e3db833c574a2a2ebb8fe09166ef4c222c1180cc27550010f. 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/ES8191200477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68f9851472d5bedfdd9c9088803490fa90188f48ac6cca4293071315785121b4. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ESA031601901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x592ba593e1d10b3d52a95eaffbaaf49596eb177ef7ca44793317a11ddd2e3ee1. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/ESA031601902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cca708ae8aecd4ee7cc05c98bcc35183281c22c19c32405a4a10d9a5392332d. 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/ESA031601903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x917fe11539b6603ea1fed73a7a7361c2f316f4afcb479892505e0a65b0f56d6d. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/ESA031601904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cd76c0b985438ade133f3dd2a0d3e60c09d1148825000566b546e7e57212130. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/ESA031601905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14ebf3ae05b9786c946cde1e9370289d26b83a2017704a4e9430a4b83850258d. 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/ESA031601906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x891a1dc0c3f7ab48a1cdc40d48109d3213d4e83656bac3d3169e4b7c948105f7. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-19T22:07:06Z), 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/ES6101700063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1f26428566341feabce1766fa6a770039e88bc3dc2b1a5a0059a777cb86117b. 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/ES6101700066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23376dcb97ae85a05c5e1bbfda09daa9ec8a0a4b3bf8363db7fa5792dbbcf332. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:30:26Z), 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/ES84B1900230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70bb6608ee7d8f9a7dc497166456e85ea905db9489ffa6dc818423015b1f20ba. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:03:53Z), 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/ES84B1900235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfadcf05f471ceffd9afa76856fbe2e365863cad96a151adddd1f4a2dfba7110. 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/ES61A2222961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x000fe0e3add8ffa1e8d7c71473a7c6c1ae4bb8c8929683052e99aa7500bbc9a3. 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/QZW9M2431967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41ebe2c41986eb9e5491a1a38da6357369a07be5daf8b7dcdd5b0516839c71ff. Chain 2 (Bitcoin): anchored in block 957772 (2026-07-12T23:31:17Z), 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/QZGLS2546077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e96d363231a8478fd423bc4c95045fa59933e1ea2d77ffb14fa036218814cd1. 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/QZMEM2288105.