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 0x49feefa8202a97df1700786254e4e12dfec7fed663ba69c9f75c1260a07076a7. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9ab4d517-c3f6-4079-9fd0-59e40c5eef3f.json and https://artists.proofprofile.net/proofs/artist/9ab4d517-c3f6-4079-9fd0-59e40c5eef3f.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 0xfbd3f988f4cd48743a97993d1c81cdbe53ee521151eb2953b559b34e79a22120. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/GBUM71704399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a4df60cd74328646e77f3484006458e61af3efc54fe00849ddefc1d24727b79. 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/GBUM71705447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf40a7adf19b5e3361e3a2f432dddd65bf957b9d1558244de3cc5f9ecdc4fbb6d. 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/QZK6J2135695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2b0a6ce6d49c69bec1b51e99cd7d47da032fd90eff36b4ca2889ecfba3bf36f. 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/QZMEM2063438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2a443364430c72732f379cffcbac6c04b0b7e75f0d738acb6c4b8c809575aaf. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZHNC2002986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59a4257ea7e7329bc36274612fad3a26072a65934e386bf26b752af69898df20. 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/QZMHM2288102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e0a6566489df96aae3b974932b7bcc78b9a6da007629b8acc1b32b3eb2dbf13. 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/QZMHL2222003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ad93e0e07197e2b6e87ac92c4cfef5155c60772d1941982334960d738b26030. 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/QZS672169721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d35ba49dbfa2ace6c2a787e3234f7c8b41b2220ef969d53f39c28de9465c76e. 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/QZMHL2074192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x894618c72cb10fe432ba382d5d7bb269ed6a9df97a0c34104fb0424006fa718d. 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/QZS632101672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd572ffc6e166e4c90503e376f370a02452a7c65882b16adbaac492d2e454e65c. 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/QZMHN2201459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6b2b936dc1925d222479c743ad7894116ff37ae150c28113532357dbfe45498. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-21T16:35:07Z), 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/QZS662291026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x635c39882cdc04580abfa11c5fb6aa0ed1f64c64e6d9a9ab706218074af17679. 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/QZMHK2226326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff8cec65baf63421493ee976a3bd462d20c8222f93da0885aaaa8d210188a3c1. 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/QZHNA2209191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1aa409ec1086bd2c7825fa14a8b648ec788f9e9c6691bf65494ac69a1e08ad0. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZS632226496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x805be374d2be4902c5d03fba92c9e3539a0d80c6afdf4c33dbead3c945a2d5d6. 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/QZS662104895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c275b0886b663b2fdcc340368780790edd2ec68cbbffdd54a82a43132a92360. 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/TCAFF2015148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44a8f2b3db2cd98a5d6facbc3e1caff312bcae339611e2ec10d519e185729f03. 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/QZS662140647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x279186940eccee0570efbae0b3ffe2e7e1cc0cc98cf9140ec3856faf3dbac1e5. 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/TCADI1705238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf188aa7230f29a6855c479dc599bb23bb878816b35f52a246377eb056d3c9a3e. 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/TCACP1611254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08f1690edafd91c182b565402da306318c95985fbc4a1b445f20969873b8c94b. 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/TCACP1633546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d33629cce108f4438e6c4e9ac71d290eed3835477f7e9aef7b0eb3dd2c685c1. 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/QZFZ72137485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc89cec5735e46515e95a2cfb7d181d1564b713848f5b04c97db47b89c19f572e. 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/QZFYX2191014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f47caffb6a2a819895007dbe5942e578c270cd7d5a878c85612b04bcffa7741. 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/QZNWU2071348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd70b48953c68c839f64d18545a025f6249569c075a6c68849924e3e087dfea3c. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/UKXN22103577.
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 0xba07e6b2928ab4ee20b08656e37d69d2ab2c8ab32cb774d2c240e8822f8b0375. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/UKXN22103581.