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 0xf01ec550940468581ad8312c0c265662335a59cd2454b543448283c15cf3242d. Chain 2 (Bitcoin): anchored in block 954650 (2026-06-21T04:51:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d9b3b026-bb5b-4e15-af2b-bbe7f9c46e24.json and https://artists.proofprofile.net/proofs/artist/d9b3b026-bb5b-4e15-af2b-bbe7f9c46e24.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 0xac30d4cab25df2b2348f38a5db2d13c7a463a4c40573a9368f1d7033300a9690. 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/QZHN52240153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5b357e1843cb9da6a8488dda047464633c97600f780a8ca04a772aa33b1c2e7. 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/QZNWY2041799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb25f096cf4fb8eaab1753e3bfeac2d0ecc7b8f3a6dfc787859f7bd114dfecc2b. 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/QZNWY2041801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f2de7e77e2839781ab6a443e7841c6486b455e51ffa6c7cdc9b07022e675548. 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/QZNWY2041803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc619c489f828def688d728be6a59bca18addfd86f79722df3a0745012de23258. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QZES52367698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x464451e43391da01ee50f489600587266255e4fc4771cb22fda61c6c60616d5f. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZES52367699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78c0cf3c14588e98fdf751717fe44939526981a0735dda8067dbed35dc34ef87. 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/QZES52367700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x326db6a38f2e72e013417ceae5e15df7f12b3be9b2329924203bf2d810c278ba. 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/QZES52367701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x787cc408e7fa1814d8858751a6017711602f42ea1317d8145cfc7ff6252d7550. 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/QZES52367702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b0499a2338d312c98630d8960b2e087a59ab4dfa96c109ea26c373fbb3ff64b. 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/QZES52367703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fef9aa11a7f0fc7f41a4a385303314374529803af14ae738b136521af822b0e. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/QZES52367704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff455ea052588437cbce267f1e6842a374f63b1ccab830e33f88b85c03f06e16. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QZES52367705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b390e77dd4e925e4448faf5c20c0d8ca863e84a7c9a7f841996aad5a8625862. 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/QZES52367706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ce5fbead7e536adfb83d987c84a61d4583e9fa670d968c18e9174d4ca3cefbd. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/QZES52367707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f9e6a33170a9ba4532b170a0a8f181ed5cb84c4487e136ce8e467c12b9e76c0. 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/QZES52367708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4203274d4f26cc18693c9f3c6608f19206b1bbd71a51a51756d6feaad9297eb0. 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/QZES52367709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e2816171ed94bc020ea18212762140f7e68c2f722a07ccf6b645fe7f8be5dcb. 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/QZES52367710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c4a204e6bf45861ed4bdfdaeebacdf524c1872c746f8d8fbad853b311ab73d4. 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/QZES52367711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ab3a3c5484c08fe819444bac62e4d9cc1ca78c4be17249548f552341b2c4d79. 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/QZES52367712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5786900da0a1564dee16073787f84acc5bc1857e3afeb5ab9e1213b30e8b0121. Chain 2 (Bitcoin): anchored in block 960153 (2026-07-29T21:57:12Z), 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/QZFZ72222016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84d2178532119932e40c1fe042b5f2cea3ab03bf85d0cbacb44223422b0c140b. 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/QZFZ72222017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd8e908cc82b5c20a9a4f6e854f728f72f11b987334f2e137db350562dbf77e7. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/QZFZ72222018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb0d5bca014a3c209e04269db75870af26e4921057335e7ee3ff413e151cc1d7. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/QZFZ72222019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b90bb3fe1ddcd6fb2b591e29a0261c6aad36442aa20e7a186697ed34e1f31b2. Chain 2 (Bitcoin): anchored in block 960200 (2026-07-30T02:37:10Z), 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/QZFZ72222020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa46b298d2f62f42d595863aecec6f32383062c0fc1858785a53d400780dbbd09. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/QZFZ72222021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb976c92bf12be13ba689ddf9394c2f855a86ed1a895ec6325b3341fde132f51. 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/QZFZ72222022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9041cf42776993805d4957442071f4e0a63175ef0dedbf58ac0690e5f19799ab. 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/QZFZ72222023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51db7860578a6be223bded61fc6c3a789d3904b28c46841dfab66aec060a2d50. 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/QZFZ72222024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef5bc592b74670952c63d002409d87fca293622ea7aec649bc596d6faa487979. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/QZFZ72222025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13d605bb5e5b097703c66946c8bff019b45debdcc2e5cd4fdc07193d06c712a8. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/QZFZ72222026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad74ebcf9815f3e8b6dd681202bfd9b1cb72f30d15ded6e4ca038b1fe4406af5. 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/QZFZ72222027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fcaf84987742ded3fe8f18c5cd5138fbba8ca35f83ffcfad8ce7ac5001dcc74. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/QZFZ72222028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa558f5902dae4bac0567aacad3fdda266812f8df6ba322fc433013ddc4ebe54c. 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/QZFZ72222029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5271578292b558b4719609b9d932cf43897f42bcb689ae235c0ca8f82db5f155. 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/QZFZ72222030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x551e8e0af1f4b725dbdf3191da868e9239c9f9e2e98af83696d0e5c207d280fe. 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/QZFZ72222031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53068da8adeb64eabaa2a7b58d865c655df574ee85c4af37c546df8272c9b87c. 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/QZFZ72222032.