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 0x78c42afcd82a92eeb31cc3cae9694a07b763206efc0b7d6280cd7ae36bdf90fe. 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/6d1954bd-cc50-4c8b-b30f-8cf323ccf984.json and https://artists.proofprofile.net/proofs/artist/6d1954bd-cc50-4c8b-b30f-8cf323ccf984.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 0xb0b23a60a4abe30c1cf0205fabfabf1108d51d32be84e3a3f410a6eb4f6638df. 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/CH7530700007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73f7cb787478bc9a43ab33cbcce80d3349eb4934259e6ba8a1380423f5cc485e. 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/CH7530700008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dbacf09af36745815b3df94bf9ec458471d790f070affa6dd6ff3d538085c32. 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/DEAE61000907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ccaed01e142be35a96895587ffba2a7c7a2e36cbb0460a46e055d16e4b5001b. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/DEAE61100988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d1c4971a862b1bcb3425c8c71f3f55fea18f3c7cb414e5ddab39f2f7205cef5. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/DEAE61201165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66007170d8e23b226e297770d9a84439739c4beded1b519c0c144d98bced7b8a. 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/CH7531500007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95be1cf4b330052ed35482a94f6e50e248c10d4ada16326f9de21a004b3365fe. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T01:51:39Z), 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/GBJX36615052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18afcb7c6065da0789ddab4de64e52a7fcd2c90e5af976ecdc34adf2e53d3927. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:44:43Z), 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/GBJX36615053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab6691f6052fbbd1298d3fad8f038ae419f139f9a0d0968cedde4dfc1d9eb190. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/DEZ651702707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c3d1a8cde9f162016da03cfd3f5df8f99c01d2422bcad6aff5f25dfc89b7a38. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/DEG931650147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa322864413fe38531b20c60de3a732f8690677b8efd1ea00a4de8447853f341. 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/ITJ781800035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc35e20599c0a9af92c31ebbdcbaae9b32e08c2c9a489b9b15afe594cd6de9375. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/DEG931850946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc35e20599c0a9af92c31ebbdcbaae9b32e08c2c9a489b9b15afe594cd6de9375. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/DEG931850946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x260e033dbe4a0466f20294c29416003fb6a120c5818710f708a27344a6c270ce. 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/GBJX36016048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d5969903bbe56c52284b6eaccf4d97da09bbb2612264287b2ec35751727703e. 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/GBJX36016050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b6abb6fdb8166a28825d93a7a12a1a132bd550545d8296a12bc9eeff0ba696a. 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/GBJX31855018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7789fc0c78745b863afef0ba8ae61a5f93aedad87b3d17dea596fa94ffad1ad1. 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/GBJX32155030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8165624d159ec907cd48e69789f6f33ee93a64b776c3c80c93ad8e69e6cbb47. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/GBJX32155031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbce2a204ab19561e3f7900ca360c18e043d90b9dd2be18635b6facb6fb480d9f. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/GBJX32155033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf473f0ebd56e4cb25806238a06d36e0a5f73ca19bf2af464909ab16180b6bc84. 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/DEY472371256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x178f21a21e14876263f6dd8283cc7416800a856e955231ad14a581a27a66cfa7. 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/DEY472479368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25aa68ec6312ebff1b42c2e084d702bb1e016ddba4e5d38ed7c094bd6837c8c8. 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/DEY472479369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f8b14e696dc3165adf7741cd4c05a2f4f127cd0f9781d9e780cff37b8966c24. 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/CH7531400012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x867265c84e5193a97db6a908692a71af5ee321edf660179255b08381df12e6cc. 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/GBJX32055004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41087eff10dbaeae3914f1938df53911bf60c1e1074d85ae2131b35d842e9e69. 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/DEPX41900298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6baa8d9708c43bf0466877c47acd219942efdd6e4e4cef2eb0ddaee9903deafc. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/DEAE60900844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe96e6ccdf6c42da7a7eaa1f2e20eb494bb8a03e01ee791281a791855d2125daf. 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/GBKQU2138667.