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 0x37cb40ab396195f337147fcb076897f6770e118240ae2d7c8de1fc6ff4b02b2f. 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/1b2fea80-c491-4472-bdc0-a590a835b737.json and https://artists.proofprofile.net/proofs/artist/1b2fea80-c491-4472-bdc0-a590a835b737.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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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 0x5904672ac9a1e9a2748774d379229eb031d01339fd18999847b9f4689c9895a4. 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/QZFML2001934.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19e1d8b397fd1464d509d2ae37c396ebcdc7977c6f9d4bde4f24f46ee47af15c. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZFML2001068.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1484b32f2adf9d5b9f3c4bb7ec86727738dea92d7ccd3c0630120b1e8ebc68b2. Chain 2 (Bitcoin): anchored in block 957805 (2026-07-13T04:34:37Z), 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/QZFML2001107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe909ce1d7eaaae24d9be4c39112a3985e63ca878c2b611088642ccbb2e406375. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZFML2001110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a4e52c89f740e457208137a57c60cf7d9ccb5566f64304e58ce949c42710cc8. 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/QZFML2001116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeec985fb851df0ed952b6a3f47e1d1089a6ecf48804e52e36db281931c174e5f. 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/QZFML2001119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12236f575eee730aa527809f926551862df5a86d9ef09e38f69fddccbf09e80d. 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/QZFML2001121.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a648e8a67d9c418ea94d0d15038bd5e83cf3c9315fa61af6a4da9b1d57100e8. 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/QZFML2001750.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6291ad31c846e84d2a95d0db602a0f9c9d703868b38adeb3128187da588204b. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/QZFML2001259.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaa3bb5d975759b2c83e08a0980be296ad33e809236d3333dff351e718e501cd. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZFML2001036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1132f2fc9087d5227e9b5bd3405ec90422a00075fd3a81ff40dad6d4b6a28bc. 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/QZFML2001040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x392fdf3559fd46a2917d72dfda850e86493bc8279458f0b3392fecd70d809f2b. 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/QZFML2001044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda88b8e1cf416b46003dc2b8719ac768d236be04f567e83848e299f6bd1934f3. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/QZFML2001047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87548c9bb77630b076245d9b51f18bd8e2e1160f162f01bdb5d67543de272556. 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/QZFML2001053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2634c440d61c511d1a80d47de42986f4243f4614bd5fd449e829494bd6a81e6f. 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/QZFML2001062.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15fd5a7c37bb5b6931b9c3f0916c2377e2b442b41140da25a6a6395074e11917. 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/QZFML2001782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53c3d9e7c7ac9a5983b58c6d9fce2fb8be9d6d707c9c731ff7b6061faacc3984. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T21:04:01Z), 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/QZFML2001785.
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
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