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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 0x73dbbdea028a51a69822f62815c11bb362f84ea1b450842b01663b7e0f313d92. 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/9d829021-f0ec-41fe-80b3-46a3d5f60d1a.json and https://artists.proofprofile.net/proofs/artist/9d829021-f0ec-41fe-80b3-46a3d5f60d1a.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 0x9209c50a294c6489c64c25926f59cf7b2499f7f7fb67cbaf051a90ca8f17dec6. 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/GBSMU7473627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf94ed86949f2785515ace5f117f0046510536c2fc1777de1f562becd034a3ea4. 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/GBSMU7473628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7923ae1d48d6e1adc1217b6730ba8303858c2b19785735bb08800529c95b089. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/GBSMU7473629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2c1754c9ec364b98bdabd413d7eacd4ff656123ab5a79c178383b83aca1d68f. 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/GBSMU7473630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c5ddf6d549243ea0e199e8ac37f8b20807f7c7efb5f96a855c3c14bd40fa5df. 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/GBSMU7473631.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84cc025d9e49fbff4727e682aac5f9f8b0d5abc7d1bdf2daf5ee38583be63099. 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/GBSMU7473633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb066563de1fb760c50141c0aabf40ee48543d821425f8743df93c4ed5302d798. 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/GX5MY2379683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x251acbea4d8da9c1c74fc44b9856849f531b91a4b7190a4e40a47f4ee93a4aab. 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/GX5MY2396182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6fa417d5c35687fe96dc5175940f02d00276d5d56da03ef8e1fb11772e74020. 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/GX5MY2365984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a3752642c664bf0e1b90ef12760d1ed4b5873e3c710aa144b7ed573a30ba8e8. 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/GX8LE2254792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cb2981a275f59516e0195de721666a3f87bfcab64cc0bd89c6ab627cca49a9b. 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/GX8LE2294484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e390250f4f8471c37b37f24540c92cd21fe3432cb79bbdcaa4f0a8bf0d8b6bd. 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/GX8LE2246454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2acfed8356cbcd8141aa5754fe1fa7387505edba7ecc44793798bfdfcfd8511e. 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/GX8LE2297622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c625efd2e77c1c5fcd241e6beb91d31bb7edd6e5961a6817dd837adabec25c7. 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/GBSMU0138246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cd29d52e518172e2049e4e8146ac99ffc14d4c0a4796377deef015b8df69431. 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/GBSMU0138247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d39873cda8927fdd25f67076731f384a13082fbc98eaf5fffbf831eb99e2edc. 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/GBSMU0138248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0b4edd8af9ae117a4d33c51a2d6018c6d46e64262a63b1c1a0487befd82953a. 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/GBSMU0138249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c38dbb441d5fc49b53f984e819dc4891e7969206be6c980c381aaf334efd67d. 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/GBSMU0138250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6b48f2ca596d1e65466202870ba8f25be0920fab13417c15d664d0fb1d0d507. 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/GX5MX2165248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc50e210d6c3a87a653f1600255efeef5f05cdd994c7ed76d795bb07aae620302. 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/GX5MX2165250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x075a6113df1927d75377187647a2358c1a7a3487daec5239a46a5a0f28623ea1. 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/GX5MX2165251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a9722a0dee8d53070e2f0439d2f4ecfaf7f6d721f4584396a0a839c0588a93b. 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/GX5MX2165252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b4e28e19fdba3f20f3a15002c3a8ad35bffaf8ac6e1e284c58a94a0449128de. 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/GX5MX2165253.