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 0xbc6d7c9a66593fe1e9cd5d8badfff0e0fb311843688f5a6c869c110d46ff0ad4. Chain 2 (Bitcoin): anchored in block 953694 (2026-06-14T21:38:09Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6bc53d57-6d21-4e9b-bda5-75239c218fc6.json and https://artists.proofprofile.net/proofs/artist/6bc53d57-6d21-4e9b-bda5-75239c218fc6.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 0xb71981d215ec50743df0b5fc352cbc95fe62a6e915728231c525879bdc88f082. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZHN32089359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf928c0573e582c42aa84c2814bc86864f04b7c14f3c9884cd0bc971f114d8f79. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/QZHN32089360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x778898ff7f6ad12af618402ff0acd31c790a851fc7ac94b5cf8d4aff8a2296c6. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/QZHN32089361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5102977e2912bfba249b1d15c49de899ce3e1f784c6cb264529f7dd2488e0d91. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/QZHN32089362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc260d330901749a09dae79f1a3a4299d46fbcdfceb5f50d5e3f2dfa0ae81c2de. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/QZHN32089363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5cc6887288852a85e05526503e2cd4aed84a137f489afb61dccc4920137cae6. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/QZHN32089364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x491391c47f4f8d1ae35757975aaaea11909ecc48fa70c6a4a98ceb4b3323e337. 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/QZHN32089366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf67841426a83c62576b2d72ae6127f04066ce557a7ee7eb9c4bceed91d4711db. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/QZHN32089367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56442ae831b72ab259dad08691b0d0d0590d82abcc6eece508b17848dde68542. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZHN32089368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4be596c2bc6b056a614e0a24973bfc087906d092eb6510911495cc5b27ad552c. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZHN32089369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84f2f487271595b2df83424befd889f777ca3978483c06cfc6671b59d3dd756c. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/QZHN32089698.
El Arca Esta Aqui / Jehova Esta en Medio de Mi
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc35cf8d7b378ae7be0882e95d90172f0e343b18587899556b2965f55d2aecb65. Chain 2 (Bitcoin): anchored in block 960268 (2026-07-30T14:53:07Z), 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/QZHN32089699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f4601e8b03be089373b574cc955600b6c96c747be573eded2ef651142975a91. 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/QZHN32089700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33e716175bf9b8d3b504fef229e143e2e8dc057576772bcbd538444ebe10ef4b. 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/QZHN32089701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a26ce414f1b1e1c753e25e12359f3ce5cc9c584b0f3b753664f18c1dc430806. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/QZHN32089702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9602fdf9d6905c4982f20b4c771a14b348fb2303363d0692e795d1298e6c9f01. 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/QZHN32089703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x579cd518357e67cc72f2e262be1d867a944bdb031a8742bb524bb4bda8d6c2f2. 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/QZHN32089704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae7f43a46f5eff7b5f3f998e85d570fee73994f149a1c3ad7d15950c64ea1257. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZHN32089705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00a184b929dd7b9cbd469b9b859aba0ac521bc1282a07e8afe0a107a60a02fc4. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZHN32089706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2854d407e1187afa369490967efb43571e15576bcfa88d02bd91175f83786ca7. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZHN32089707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaa25321cd87ee71b4eff22338d784ebc35088cea13d9ed4d3d4536d4aee16e7. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/QZHN32089708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e73a0d05ffb597766ded8c7cea1659d7a96933c6b2a36959846d42a8d0388ca. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZHN32089709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfef725684d8e47ce8197c27a22d93bd15dca93470b05cfd2fd2e7668bdcbbd8. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/QZHN32089710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x864547d27808db1fb8ca9bbb3e35c77f038e0853550cf05e59556852bf7ec401. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/QZHN42000196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73a99ebadca0ec28cb51d45a955506123bb257d9984ec48ba035f8aa47fa3432. 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/QZHN42000198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4e93823914248c9f5f96b6d09bad77b81b3be014555c989fb422eccc8e87fc5. 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/QZHN42000199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf57a5e68c73af387c105a2c6049b1034b97c10ef8ce7d98ba11e886e863f873. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZHN42000200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36782cd0a786c0bc6aaa7d4cad62f325e8d836061d3dfb57172a3a10556ee462. 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/QZHN42000201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdedcc10dadd308c668a5991fda3bd8e5bed608090b50221842311b0b56d24dd. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QZHN42000202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bd0c13eaf5fbebd8824c85465c95ced54f38c11a17c660b3428b0b3b060bd3d. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/QZHN42000203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf74bf0aa5f11aa55410f39e715961cf948660fdef7e8347f4a5819856f795b52. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/QZHN42000204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x110cfb763d6c4ad45ef4ff1a91de4c57daed490a01540f931ee5871a1f79bedb. 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/QZHN42000205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x721ae868eaa949e4fbb35858ffc319bda2bed78393692006a4e3963f31473ebf. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/QZMER2045346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x997739a636c86c4da57a7828867d9fa22c15a47243a4b031fbc82b910e11bff8. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZK6G2034866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefa91389e2015431aad7a660f838a5ba2a9b3d2d714de7836403fabaed496526. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T16:43:41Z), 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/QZHN32089375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3575d42b9c1635bac6b3aa9eda5f69a24199a5498f5979b2cbfdb12be97e1991. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/QZHN32089866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86b7a01be95de484d3a07f40aae7aa3b1f7353357e5084951193b4852d732cf2. 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/QZHN32089376.