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 0x962ca98c334b481752add1e16724b143ed27cfe5bfc0f18093a630aefba683f0. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9eed7510-e740-45a4-b289-3a25af6bed14.json and https://artists.proofprofile.net/proofs/artist/9eed7510-e740-45a4-b289-3a25af6bed14.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 0xcb2afd9da2eb9b445533bf8e29d7f5d9471ab3aac8477bb86528bbac7645e886. 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/ESA112441194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x657996014e818b340eca9562583b057d2238dd2b80a616bbaec9ac1ad94f335b. 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/QZNJY2432439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51c0121df14225706ea4eb79e3b4bd67eb4a4ca1a7168df203d74e126932ce8d. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BCFCV2400623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9a6996d75ef2f9bfeba0515d2ed8bb324df732a6980fa731928735beac63335. 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/BCFCV2400482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6b9a2a336325cc8b1ded1fdd77feddcee3e9042558172e6591f53be44b08b99. 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/BXP0K2400999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e0f92be22a2a30584f10b8a8d0fb80a549ffb61a621ef8b3cedb8206943c7f4. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/BKP9L2400077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5af7d919619d61b67da98faf719fbdc826662135b88d180d6654a1de14683015. 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/QZNJY2495891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0812401a0b47a9e28b120a1e643067efd011c3cbf7e5bee189753d2f2d7b749. 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/GBRKQ2572305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd00f575e23ef99b5455d7abac11925c051810ebb8aa6921eb2df6f1a05f20dfa. 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/QZGLM2522277.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5de682a5cfdb37d3d5f5721b18230fcb452f3b132a392d722719f4aa25ce0da1. 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/GXBAV2573684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dee737b778ff1e54804b342a1b3554e22b20ee2486b2a1952e5e0465f077f04. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZW9L2320549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e3671092b1ea53f14b53a2d19c623fa102edac18b8e3c3e946c6e30f751fc34. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/BCIH82202146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd437697ea16f353c04d50b172563f61494628124db560fcd7db20ab60637d02e. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/BCIH82201677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeebb5b3892ccee85619e8402d458c5939742b5ba90f4acab0b12f45004bd034b. 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/QZW9L2320550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaca267e3eb0d62e4a4fac00fd68f1dee219d83ea64b7fe601d2821000d8b9f3. 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/BCIH82400086.