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 0xfa67f58136ab5c66bf8ad49673720cbf82f7536c981f489da9c0125b4bfac14c. 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/e241e6e7-ee4c-4596-ae38-77bf2491ac05.json and https://artists.proofprofile.net/proofs/artist/e241e6e7-ee4c-4596-ae38-77bf2491ac05.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 0x1e77ef019fd1a4120cd10ff012c898b6f5ff40d883fffc70a2c8dde38668ecbe. 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/TCACM1699516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee98529e341960f135b96a63632e1d3f02148937601d6a5e19597a67c69a31a6. 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/TCACM1699555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x615c6348863389d17922953a218f513f322d1ffc1928d9c67fdcfb4c11f5cd02. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/TCACM1699557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60e6ade17bb2adcdb7e27d19ad70d8af3a8d45bb4fa833dc71a4d35429d7ce1c. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/TCACM1699558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdece4e687a63486044741398da0e8be198cb4c421e922d19600950fbdcf3babb. 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/TCACM1699655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2acec60b6a71d90e4a747d6586752ee9363e83d029cc9acc9837cce9a68ec7cb. 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/TCACM1699656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x280bb60d920c280db4e466091a7e060c02f1966701e3ee962e268a7eeef5ff7f. 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/TCACM1699658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3aa08080ceea4eae880c39f23aa6325f3fa217d6db0e27bd02403ba271ad07d8. 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/TCACM1699659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb03f5b45072847dacb0a1b586d1faff38dec4168e69c5ff05d95922b1fb00d64. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/TCACM1699556.
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 0x316b252d3fdf3a7937a8124c044fd0bf0598147c78a861c7e786c06dd91489a8. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/TCACM1699528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c83f4941315302e482944525a1dc5b6ca5df82bce3405b32cede89fba381b52. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/TCACM1699559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9543f08532c5e2d697126b5249766e5e5a683b245c657dba5e9227312d6798d. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/TCACM1699652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d5a2879f7b5e0244f1b9c0d0ede528b746c497f912dac03143944f3038f1310. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/TCACM1699654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5575b3aa57d31fda2f1e13f5a7eb9bf204b37d41ff9f4d4494363fb0b119b57e. 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/TCAER2099888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ea26052792648c78466c76a58fc32ff934d7ca3feb0c59de09bf84e7f6c1b20. 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/TCAEY2044362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a869c696e1448dc68d76128db7e7d8e5833c1db451ab61a8fa437cf66b3bd5b. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/TCAJE2521931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe610747ecc0d25b846e85c74e9325a5a3baf1c44ae72d01c6c092094700a328d. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QT65X2507923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc0e3879508748c9141e6e351c92ca9448fe02ad439109200adfda613127f0a9. 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/TCAFC2006991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dd950d1f36845287fa5830d768a1f2c1afe230e14d5ccd303eb9592720a707f. 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/QMDA62134612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fb60b71e2ad659450d1b88cd85d7b43b7b303d195ff4e79013554b8fdd57d33. 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/USHM82146375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x799e540df668a836f50d67ea70a817ac8b952f1d9943959ad1a7c701bf12fe53. 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/TCAIC2462952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46e95c9f08e4c9dc07b75bcdbc286001c47de181d49981b4e5feceab21993f38. 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/TCAFS2126461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5fed40d2f9dbca6d9dafb40c392dc35b4feaac2440576ea20076b6a23a2ea06. 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/TCAFS2126477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd894ecd45d6906fd0bfddc05f213c9fdbe39a8d7cb29b890b65672f0cd9342e8. 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/TCAFS2126518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e4381908f7a8dc2ae2fead6d36fe4fed33bc50c1c6dfbc8f7c2ba77080862bf. 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/TCAFS2126524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd3a99e91e97618795506bfea949407251d19553fe11cea2fd78c317aa77efe1. 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/TCAFS2126542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16537bb15efb3de2f58cbf44b3bbc72b27d9c1d842507c623f7a6d1bbfcad5a4. 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/TCAFS2126548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14bd832c323f052daa9a07379da268df29dd4758fd96d25578a5192ddaa7f14d. 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/TCAFS2126565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7d816d3a8f2d3f9fdb88f5710b1530c32e7a64b4ebfae57f9f3306ea7b901c0. 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/TCAFL2119422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4569482226353b0951c070796196ff56720860a6474f21029bfda563672f296f. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/TCAGH2271551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x270c6f4ca00dc9881fbbaf04f927d51bb86f0f18c682f4fd7893da8854bc31d2. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/TCAFS2126537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c8ce47ebf0f9134f2f9fba24687bc9f0a0c092aec38bd52d40dc9274c73d709. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/TCAFS2126572.