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 0x2793ccc3f569333d3cd6546ccba9ce78bd6f627b86cd5a8f62f89542abe0e5f4. 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/4fa20c52-772f-4aa9-b465-4457bf9c2ee9.json and https://artists.proofprofile.net/proofs/artist/4fa20c52-772f-4aa9-b465-4457bf9c2ee9.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 0x1d54cd4ade20da3f038275b77e264766dbc19dc01468dbae47f305181baaf19e. 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/TCJPJ1967153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf827982baa43e52761c7b38d9df90260b092fb80158e761c67dfcd908efcb74. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/TCJPJ1967156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0cff645f975e7f031d7e8e931054323e59d5b4a090edee34f8437e00ba9a582. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:07:15Z), 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/TCJPJ1967157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8b7511d28ef32774c46bab107825f4a75d2bd14a0df994c72d69b86f5d0610a. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/TCJPJ1967158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b396d193a2d10c13c574c0d4cd4bddb5a6c6024d6954a8a3a7ffb44c2584132. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/TCJPJ1967160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8421e779b8a750e4d479bf7fd2b40ff7acc978d1325ee87306ad6a59a92bee3a. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/TCJPJ1967165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d54cd4ade20da3f038275b77e264766dbc19dc01468dbae47f305181baaf19e. 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/TCJPJ1967153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8421e779b8a750e4d479bf7fd2b40ff7acc978d1325ee87306ad6a59a92bee3a. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/TCJPJ1967165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde0037e7ac2a3dc21a0632fba73b701ca818c7368159020967f1abf14f9dae85. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T18:53:24Z), 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/TCJPK2080033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x299c6be409e1eda29a2645956af2893a32b171faf1b5044c9908e8e8aa7917b5. 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/TCJPZ2480706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x946a7a73674b51d4a56385e9cb925395dd096d1bf60f5ae35539a65d6830567f. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T16:44:54Z), 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/TCJPZ2480723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9fa51f63961c667a786ca8b46b100317eca3ec936fdc47668602bee8822c0a9. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T09:23:46Z), 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/TCJPF2510143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55f2a80c0a12e5229dee3de5b5683af332d303db78746b215a09347a34c2cdd0. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T10:41:01Z), 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/TCJPF2510035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd99a8acfaea9984fc60dd168efe21dc179192dd974d7f8e5dc2ec45477701cae. Chain 2 (Bitcoin): anchored in block 958785 (2026-07-19T21:40:06Z), 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/TCJPF2510086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9fa51f63961c667a786ca8b46b100317eca3ec936fdc47668602bee8822c0a9. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/TCJPF2510143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e586f7d0bf1e719c94f7daff950cdac714185a861c8729b13f3404878891fc0. 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/GBWMY1750300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47750bb3d28b88192cac62f8bbc27f5173f19874e366ecd014787b69ae032b77. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/GBWMY1950330.
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