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 0xf9eb618d85b2eefd2c2ce36004f77e02e514cf830a60edc712c5fd877be8d219. 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/1a641c37-7b5a-4bd3-9675-b7918bd1ae1c.json and https://artists.proofprofile.net/proofs/artist/1a641c37-7b5a-4bd3-9675-b7918bd1ae1c.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 0xf0623bd053d548206b9ddf7104a9064ef77c89bbcc2ea0b8e49ff9e5d0b927d9. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T23:10:03Z), 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/QZHN62161623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1a006e36ab31e96d38d00f872c6a7a53c9c89328cc33793a6f7a9242f2c9612. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZAAJ1701187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6f834317d15b2c474d308cdfd96705c4657f49568f3ba81aabbbdeebba508d9. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZAAJ1800485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92c8fe470d868f32879ee98f50ec4e8df1744b9de806eedc0a92af2e1521a27f. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/QZAAJ1700922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d2165ee1dc89f8ccd9536677c7abd3487cf5f98a89581e011645e551cf059d4. 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/QZAAJ1800264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6fee3b2454797c8c540255f9d904a98a2fadd427b24c0577602962f0243949a. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZAAJ1700626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f4e61a6ad5a95c583357c8f19c73f34053b24da78875ad46d94941318458942. 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/QZAAJ1800440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fe2b40c8ab6fc6213d09e329874a819b589cd6274cc34c40b04276496b9e4aa. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZAAJ2204045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ce4600fef1bd722e769be4db332a38ffc8339077785be58905550657a487112. Chain 2 (Bitcoin): anchored in block 958703 (2026-07-19T08:36:12Z), 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/QZRP52285213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24a7b99e84b1b21301a5a353119557f09a45ee04267bbd9eb0d2165f5b36e874. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZAAJ1700156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65ea98392145e17ad8687f877908074bb755001700b128b3e70fad3d1c576d56. 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/QZAAJ1700111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76105409ee5abdb732b7176ecd27ca08577e941b75c54da82150b6b024cae81e. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZAAJ2205203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2635a7bf545c039d5ad3f7df4c3d9f795185ea3264ebbbd7e1ad404d91ae2a2. 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/QZAAJ1800635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c5d684522b5550c1603d4f94063beb8d0004919a503676605542c8833f4640a. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/QZAAJ2300109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2535b88a8d81d5506aa789536e24f2a89fa939e2e68f104fedcfc813464378c8. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZAAJ1902518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55e5acf4bab770cf21721131d7a19688e2e4e9593c4a0265d7b6a1eb1a2071de. 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/QZAAJ2204767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe50e9cd283e283b8df5e259e48eda19bf7c5aa06e9dffc1467e702128ffc2ad9. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QT3EX2576309.