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 0x29db1e5f80f19962b80d41091b04629ea21810108d88c0d3780ce70d07805ecf. 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/46848b85-d466-4b06-a622-a8560cce6ccf.json and https://artists.proofprofile.net/proofs/artist/46848b85-d466-4b06-a622-a8560cce6ccf.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 0x22f7bb9ef36175f3ee356383dc724a1091874e87063529419abf641a2def31aa. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZ3NN1600001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd9dbdc7716085c2d8c34e02d89cb5ea8a04cfce4048e7aa4687f72afeaaf8ab. 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/QZ3NN1800001.
The Good & the Crooked (& the High & the Horny)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d42a053f8721107a7e3ac944c3c1d2c92ad7fc49a95a76fc233414d17056d7f. 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/QZ3NN2000003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79bd74e33cf08b99ab5482d3dbe5c2792d02fbd63b6adb42c1a6732cd07353d3. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:52:49Z), 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/QZ3NN2000004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0982be9ca601e9f11f2632cf3cbe3e9c33a115537b825fe4491d22764434f7d. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZ3NN2000005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6965bfb0367cec1b323e5fdaa219f0389121c98a79430badd68fbe9beaf07fa. 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/QZ3NN2000007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3441834e41127c5687426bd4dc82c4a5a03d6f0477ff7043e96387aacc0861ed. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/QZ3NN2000008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0a064d62f4a9d71446748d3d1a50eee2acbf1a868704849539ccea841ac5cd2. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-22T00:16:18Z), 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/QZ3NN2000009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cad67fd825bf492c1caf437c35f59f30d6f2d715d09a0cc76ac7891b9303135. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/QZ3NN2000011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa554cf171b8074b9a72590f2e8fcbaa61315f8375fae0c12ff2b27f46af98431. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/QZ3NN2000012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6deac3e7371536833e00119f2f66a8e0dd9d0840699015958cb8c88acd7c2a34. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T01:08:10Z), 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/QZ3NN2100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb151ec9c919fd4074f521a8b0c337c0ca6713d7dc88de83769531fbaafec7f2. 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/QZ3NN2100005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0446979be787b4de43d392686d5f2aab309540d3e8f199d1b52127645675846. 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/QZ3NN2100007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51f39a88a46a6e058b2d990fde3b00b72cf9873f6ccd53b4023305ac257def92. 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/QZ3NN2100008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x796103d401ac38427ff7c13b19e4edcb3ea5bef0be53d99c268770094a3e0929. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/QZ3NN2100010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf91508a96420ff35541fd50a90683fcb960730e6a9793e75262f624a6dc21b6c. 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/QZ3NN2300012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6062748e7f98e5048c6fe2e12b73123fcf09edc1f33f69decd72cdcd7974014f. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T22:24:48Z), 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/QZ3NN2300019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21cce3309046901a3784521137925d568089e8769fbdfdf3c3f7c806874298de. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/QZ3NN2300021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x952c666542284bb3968c0221fff1526366c68f68f273ca2db1a0d8cf42799bd9. Chain 2 (Bitcoin): anchored in block 958705 (2026-07-19T08:43:25Z), 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/QZ3NN2300022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98599bd21681a40419ed5c82f6cc97919e70e02bc466de45e9f23c2a88612e21. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/QZ3NN2300023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76c5fa863a90d7fbd6b4edd135cc402b07b400c25c8f7f9e587ccf600f0b472f. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZ3NN2300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x527b6f9e3a76e90ed33e915046153aa3a5a9978f9ae7958a25e7086fff79a808. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZ3NN2300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb5689d75ec38fc1babbec2bbb6b0c179767d6ea231edf0188a82ce5fb4b0325. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QZ3NN2300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c14edd1b04d1faa6801d3949fb4f660d230c14902265d174c05ed5c111c4cb8. 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/QZ3NN2300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d83ce125a05fe0ab0fc938b251b52b02d6c217a3ce884860db9d86ed7b315d6. Chain 2 (Bitcoin): anchored in block 957744 (2026-07-12T19:15:44Z), 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/QZ3NN2300008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7637981b56084c2c264a614e132d79ed75dbf6845ab459cb39871a2f272ed3e0. Chain 2 (Bitcoin): anchored in block 958670 (2026-07-19T05:26:23Z), 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/QZ3NN2300010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff25459384402a4d57ac6f09df6d60c449b989a27c1117424d9e19637cbad4a4. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZ3NN2300011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67debc94804593b55782634fbbf8b1e9a666176299b8ef36e4e0c34488817e44. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T19:27:18Z), 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/QZ3NN2300015.