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 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 0x0aa247d09fa8c18e00abbc1d4d5ae3ffb30ce303bc58eab3a3d1978d72828080. 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/0406c82f-9345-4835-b116-3e6afadaaaf4.json and https://artists.proofprofile.net/proofs/artist/0406c82f-9345-4835-b116-3e6afadaaaf4.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 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 0xfae0ca46bf18e487ac7d9a2aaedcc2d4eb5e1a12789b0963805391c874b454cf. 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/SE59D2146001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x762be4c161c64dc1bcb9175d5d55c79171338009ae4e5d3af17a86522df077f3. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/QZDA72259684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x907a850af97d20fc8ff94fd3c33a9414c9a69d4f03262b53ed6daef902ea063e. Chain 2 (Bitcoin): anchored in block 958407 (2026-07-17T12:08:48Z), 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/QZES72273283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41153ca774786648b6f2229f242dc3086bd6d0b046f26c57401ab1b65d1479f9. 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/QZHNA2252539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6332ee4820f7508d9b557d6bf8254bc9e9ebe13f79700b34f367fd1c53a4fee. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T16:17:58Z), 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/QZK6N2235634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ba3e5a8dcfeb864691fdea5253a35b6f778833190a4a1edd16217c8125cdf43. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T21:23:21Z), 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/QZMEM2251611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f9107296b30a3248dbb8b46bfc375bb687e6e1703ad90dc7f81e4947aada299. 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/QZMER2270728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa1afb3bffbe211a5e7d2b0f7c2a77df05eb4fdc9d1b03876566bf8ddbcca98d. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/QZNWU2225795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac7cad5e83118b9cd53fcf8b0804d9f8c2ce19d215309afa4c8b1e342deb266b. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZRP42291757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd71cf2cdfea255b5b0b301ce2d0622a9537980f58ce7aa7c7c0e17703ff7c0f4. 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/QZRP42245507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x857e76aa0a2f9bfbac68a48e2c14ae67856b0dc44c58c3bbb18fa33489eb36c0. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T09:14:08Z), 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/QZTAW2222857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5ebaf5969856eafd434df5e6abae7e549a0ee46ef4f6d2323180b3b79433840. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZDA52393080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a61c5641eefa9c5afe3592dea0c598c3433dccd4b9ad6650be369424d4e2079. Chain 2 (Bitcoin): anchored in block 957801 (2026-07-13T04:17:08Z), 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/QZHNA2396049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0d19754bef07b55ec6207c791036a5e46f4dacd1d486c55a347b46ca715f8b3. 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/QZRP52310227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2974df5f7fffc623bd2d78a0a49461a6eb115d42b777c6e1c3bda4838c1617f1. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/QZTB72379219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb032b690384bd179fac6eb9e8c3b14440e7b4d39ac7a865ea5e468709279189. 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/QZES82473788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fce7b441d1805416cfd81634a37109035bb72edb0780e6ef39894dfbe2630da. 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/QZK6N2440941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17bf4369ca11ae24b55304434902e7e045eef8da92223e61573277366723dd6a. 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/QZK6N2439684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1050bbf2e7cd34c65ec6dd2dd5f48c0ffaa0182a679dba86da37d2af49420e9f. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZHNB2489785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x660d73ceb41c39cf4172c9cf13f0570d2197526cf3d61d3266fdea0d127ebc3a. Chain 2 (Bitcoin): anchored in block 958611 (2026-07-18T21:24:44Z), 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/QZK6K2403626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x391bc5191ebf3f36bba8ab95a1d382ec9530bc56a822fd1aaea01596e04fa16d. 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/QZMEQ2415668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaca3930609ba6343a3820954b9533aa82f26a190965971140be9497fed732cc7. 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/QZMEQ2419013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3af59bec1b0496c6693cf27435ef7dddf21bf21bd337f575463e9a621d9921e. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T13:22:35Z), 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/QZNWR2470203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a8141ce84f461ec7324ba1f5849643ea04917a42123c99721d2c378d25b53d5. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T16:15:11Z), 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/QZNWR2470205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66b8bc108c2e6557686fba89908d6f069391450052293687bfbd2b24da26499c. 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/QZTB62459261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa54820cdcebc8f2666b5380f5bdce8ba4aed4090cb495c3789a7b59fd61a083b. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/QZTB62461289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3f9f4f8f042ff27c364e5b7fbd271af64978900914d4d90fad59a08742e47e4. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/NO2DY2500021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52761915be2ae4173620a4388f2a2ece155407608df4051062636e7284393260. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/NO2DY2500422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84687d603fd5c7a7a0d833ac3381127c864f0e1a991fdd5cb0ba5e488dc74b76. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/NOFA42500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0cd7eca752311c6fbb750d20a435cc730f4918d22ee0abcabfbd1074d7475f9. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/NOFA42500007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca6f89db3adcb467d8c263daf2125ae8877cab0e0a5c5f23c1f33388fb2b8f05. 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/NOWZ32300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaae21f9fda761e691084911df722eb16da0398004f946867deaee05afe7af14. 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/NOX8G2400144.