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 0xb859d536de21595a9767095674e56cbf935f340c09d51ac80b5445f2b0ce7448. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9d51937e-6c8b-4dda-b0bc-ba45c14a79c1.json and https://artists.proofprofile.net/proofs/artist/9d51937e-6c8b-4dda-b0bc-ba45c14a79c1.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 0x5b353efe7ca2c0022e0d30703db7fea0c272bb56a5bd86e17c64c521086c1422. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/MXF152301372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfac27cf00123cd38030dd3f96f39e772c42df068542f846d5b3837b608f509b4. 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/MXF152300627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c9b02383237dae011d4d350ed81c5b1ad60fef06b174aa0fe532f0dc256f7b5. 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/MXF152300424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x539b5c0b266e6347afcbcfa29a3f97b27d9928b76472b7409ae67eddd162899e. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/TCAFR2115568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4915c68bbb77bf9cb88382c90cca04778896837799d84019048feafd34d757a1. 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/TCAFR2115612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7420ed33b3bf3330a5b4f5344443df9139b858ad764c9dc41178f4ef7f791618. 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/TCAFR2115645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc686db810578971dbfd83f1e24e00f6a965280613ebaf50043d6fb1c71083145. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/TCAFR2115832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfd74ec636e1a1e3722af0e2091bb4c1e4ec9ed1d0b3baa9b590df68abc49d5c. 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/TCAFR2115870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x036bdce67a22404478442175f736d9293d3930449d034bdf4117f1ea8b938916. Chain 2 (Bitcoin): anchored in block 957055 (2026-07-21T20:29:58Z), 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/TCAFR2115888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad9c07bf30a0c3ba410dfe88ef907d5e379ab5d7b0315b74425f77a5ef6d3ced. 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/TCAFR2115969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cf95ca47b412834457a9d66a6a64216ab38d9bd77eb1c6f94f4495c0a8a0848. 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/SGW502431953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ebff5c935b4b24f66d991dcbace49cbc199d23cde9796521c89f341d215abbe. 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/QMFME2345121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fa52fc50468361dcbeb94d3f04ad4865d51f6f94614a4280aab1aa27cd135b4. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/TCAGN2264095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a8e72f2d3217222a510aa2b1700b38686992a9ad14ac67898811521f98935bd. 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/ESA011951732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x539b19b63b7cad518dd69dc93ed13dc1a769897ed1154bf63ec0ac06eade6ea9. 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/TCABA1181388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b353efe7ca2c0022e0d30703db7fea0c272bb56a5bd86e17c64c521086c1422. 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/MXF152301372.