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 0xe5dc51bd2b413001be46caa02e5f6e11d5a9a21329e8e04837f8788bf6763b7c. 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/b16ddf3b-fa98-4ed3-985b-fcf77fceedae.json and https://artists.proofprofile.net/proofs/artist/b16ddf3b-fa98-4ed3-985b-fcf77fceedae.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 0xa5429a8804571da2f741a32f6a58c3fef68cc4218c99c3088de9698ae0420046. 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/TCJPM2065026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f9f286674dc734c134161f5869092819e784c023057c626d0d9bd2e4ab92ad5. 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/TCJPM2065027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x944bbbb43948ceeaec0e36fbce056e01453f3deb9369eddd06db30992bcb331f. 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/TCJPM2065030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9adc8afd59d8533ed79a59433ff6514bccfa759c38e2e25f78f00a3abf96e11. 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/TCJPM2065031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad7ae7ff0ecfdd0f5970f540e33f24e94e69c9dc16a81ac816d846a696c947bc. 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/TCJPM2065036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb705e7aecd55d656f9ba78a91f76d6541886a359d5689abbffa816b9c31b405b. 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/TCJPK2056326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8de1e433cb91df11ec67fac95de61dec2c4aa261ad1a27f1fc51c8540cf05b70. 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/TCJPK2056328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17257f805793beddd93b8ccd5b6b7109d0d5bc1851c73c6c63edf80a2172d95f. 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/TCJPI1988787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e1451864926beaaabbb2c0b34413d1463c42f7d26879db5cf194df01b37c4a3. 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/TCJPI1988788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2efddb16996cff11891554e519aee095a2ac67a4e41244dbce3275518c2edcb8. 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/TCJPI1991693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeef3fbc81e7327cde4fa7e7ee213b270999058b23070e1af8a4e40ffc0c326f9. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T17:19:00Z), 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/TCJPI1991721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6456b1168a860b4798262c64d0f6dc7416b9d357cb1de50144ab335351d122e0. 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/TCJPI1991723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54dc8712e18814a5d0957bc031b71063d8c23b78f8ff33717af42d74d12d8b80. 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/TCJPI1991726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9b2bfffc60971303b2573aae2415515e8bdc5bc04aae8653d6baf836e8a2df6. 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/TCJPI1991727.
0 Light-years of Loneliness - PSYQUI Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42bf20d0413e78bf82d09c337f500fbae43352e5ac6ab89674768415fc0e9be4. 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/TCJPI1991729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb17220ffc31355c6ae62248d8a7fa9123b225814964cc86641e52e8172f1c00e. 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/TCJPO2119142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e07fa705cf6023d44a49f7e93f0143e5e93e77d7a1bcff9902f6f74beab23da. 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/TCJPO2119147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf10bf21c267876f787bc42b4ee6e6fb010237d62e81c6b95c63361e2b78f8576. 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/GBKQU1981568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf370098019d6f9f2fa1f0950f74028719bd6957dc0a6ec7d263459d92a1fe028. 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/GBKQU1981570.
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