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 0xc558aebf0cb0da9809f60b4d954e519f12cf5f9f4ff8d872a71a21ecd312104b. 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/9ce97af9-352a-4565-b6f0-e393822bfac8.json and https://artists.proofprofile.net/proofs/artist/9ce97af9-352a-4565-b6f0-e393822bfac8.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 0x851e2ab7eb124b8819a8b4f8e873699258b288ab2b9e5fb25b72c8be80dd52ed. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:35:41Z), 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/SE5Q52201077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ed3be4304b20bd636a2c7a8ae5e4c43b3809a8956af144d0a97d1e04c1c6c65. 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/SE5Q52201219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdec291dce0dddd09af155b7cd07a7bba0745fbd62b6072d59c61e8dc75bef231. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/SE5Q52201162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9eb7fee41fb55ed58421e924c58439328f77dd94f4f89f8cc9a8543c19f44c1. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:23:36Z), 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/SE5Q52202487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f02e8ed60fc828ecbf4c9b8ddb9612fa0b01668bd2b2a2eb3c3fe0414ef4e95. 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/SE5Q52202165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85499c1039f50f10217321687e648da49e7a0b8c983ab6c04672d4932b631505. Chain 2 (Bitcoin): anchored in block 958873 (2026-07-20T11:48:10Z), 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/SE5Q52202491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf923d3b44c0b356484ee25a711c1c24c2c21683d846c38b15e12df179c789f52. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/SE5Q52202641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d5bdd2062f3f18bf6d895ed921720ae23230d3c56f57323d10bd4b7a9ad073b. 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/SE5Q52203008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51cba1e8b75f6e21a29f780d97e0e6c8af3e4655d7e254cf1de6b6b5a0af3c55. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/SE5Q52300859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74dbc7ff814f09e663d33d13fb727f5945284df6b4a9a295f565f9200d0aa04d. Chain 2 (Bitcoin): anchored in block 958116 (2026-07-15T10:09:35Z), 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/SE5Q52203886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10ac109f459340f52c874eeadb2f499a34824d67c13ba75fc65e266030295387. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T01:44:29Z), 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/SE5Q52303362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6630b592081e088fdd8835d5c9158dcc739b39894d7c0d1c47f0291851edcbe6. 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/SE5Q52400253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc10aa8a94a3f473e3adf8ed0197ed435d36dab63661fce818169fb9934ec4d64. 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/SE5Q52400261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb7d6788a012a339b4d42c8d0e5dd8064926acf658802f3633500d0f20c2950f. 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/SE5Q52400610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93446b8bfed93f82eae02a11743cd57a9739c6985a2d9e169df96716c3031d20. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/SE5Q52400874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed5a17b1168f7b2af713ba0b1f4485149bdc0eedcee7086c7195de99901c45a0. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/SE5Q52402952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78b7dbc7e19522f79db2be0c139a9bf8cb19f83b8ca88cde246706bec376022f. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T10:46:52Z), 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/SE5Q52403574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x666569324c0830a17868edf09f522176654e38336fefd36b345d796769a19734. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T04:28:04Z), 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/SE5Q52403544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x557322859a9839e4dabc4be9a62bd0642cb1e40fe18cc5ad04122ca9653a8024. 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/SE5Q52403984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x563acb5a98824a1c2f06938c7bbe452620a6821216852d505adc3c5a354a33d3. 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/SE5Q52402438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07c9abf5e9552aaa87175ba29f7bf9c4a8dfa0c789856700977d01a34befbf37. 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/SE5Q52402537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e4fb67a000bcdacab1918a9ed94f750c2c539add8ff76811fe0eec2583e6acf. 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/SE5Q52403254.
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