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 0x92f504a4034dd968ccfeecc24e0029f169b02b16a8bca4d61f4056f992d1793d. 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/a11fcf72-9d2a-4f15-98b4-1465d721d8ce.json and https://artists.proofprofile.net/proofs/artist/a11fcf72-9d2a-4f15-98b4-1465d721d8ce.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 0x0ce1fd8bb59f899aae17d4fd66138de2163030a901b924316eedf7700a658364. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/ESA081650139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18a5d3841db7505013c96b91ade49607570e9746068c5d84d455c44988b759fe. Chain 2 (Bitcoin): anchored in block 959002 (2026-07-21T14:39:51Z), 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/ESA081650140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49b6e482bf091971e8a93d0c29fd421bb342a027c408235cb49da2bd71b087ac. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/ESA081650141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d2c1ae85177c9289146ff5f48f5e4438909cdd9ad76a419e94467fe473510c9. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:01:55Z), 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/ESA081650142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbca8a76864ea0c40f10d5769b8502fc80d5ed7fe528d7fffdea49fd4cac8c041. 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/ESA081650144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1e7018a39e60632fc92ed3cbc5e89d817a9e3ba30848ec1f7172607a7b67e66. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:04:21Z), 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/ESA081650145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbbc344dd42789d1f4e774acc3aadbe20412319e2bccf2fef37c621bbed3ffbe. 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/ESA081700013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x733a6de61f49c77315dea8c2d10f5e58f95f3a7777880274f73dbaff3c1761e7. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T02:22:43Z), 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/ESA081700014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x683b6dc44c00e9c6aaf0d2bd75ba99ef2b13f0139c20d2a660e5e7f1a4dcc0b9. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/ESA081700015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x303d5eacb80053212526b2a96715e215a75d650c9535fef8574fdddfcc9d599f. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/ESA081700016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4d7cb790a0500aaedd8e67ca20664b48acb057476f3976761dbe4be37a0b5d8. 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/ESA081700018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea81b9923e361694d59836cd69ed3253cf2bf7d7348e25bd64edb74b84bc7adb. 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/ESA081700019.