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 0x919f12781aab5b463d6aa2eaa54ad369a8e48605748699aa54a2f8f3f9095d98. 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/383b6c6a-6aa4-4828-ae4c-5b201255e745.json and https://artists.proofprofile.net/proofs/artist/383b6c6a-6aa4-4828-ae4c-5b201255e745.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 0x214aeb2d226f51332555fd70fd70da869735f3301743567776861bac8a30b331. 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/QZMEN2435445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fb10fc009e5d41aa59320e9c664edcb530b8371733a2d458506c4c0cf022f5d. 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/QZK6M2440193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacaa26d12c583562c0df535a8c08556613b4cd88cf3d4bff535b84b6d07f1ae4. 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/QZHN42445639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2861981deda73bb54a2c567a02786dd7b8a6dc025e3e998ec47873994bac493e. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZFZ62408333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5865f8269dd592d8853ecbb9d7c7dee1b20be4712e5e0a78b961a12a63ac6dc8. 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/QZFZ62441774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f82cd4804d3d658d03f8fe44fa2f4fd8ede14f13a5b23375d2546274649aab6. 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/QZWFK2387390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29f3f83335ffefb9ec6e18497c27cdfbb13d0f38d07cb6e24ab9bb152b4515d3. 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/AUGBT2321016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0dfe1ecf49005a0cae5330609e785642b20598ac964052039eb0dd08d6eb695. 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/AUGBT2316376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8a4dd2c006fa36c6756f5fcae16da01168fe0026af088c16633237f370b571f. 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/AUGBT2305218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8bffd4d5cd590a46df99f6cb65523aece6b4833ecc8a56c61764b433f585fb5. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZTAZ2443339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x808aeef31471bfcd51001d634163c9f935ce4dd4eac7f7ac232b5ea5c96e1c07. 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/QZNWS2466815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0c34600b6fb76798f5c85b66e29fc7489fe1c18f6079cc734b11883bf23fab8. 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/QZZ792466620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8a4dd2c006fa36c6756f5fcae16da01168fe0026af088c16633237f370b571f. 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/AUGBT2305218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0dfe1ecf49005a0cae5330609e785642b20598ac964052039eb0dd08d6eb695. 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/AUGBT2316376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29f3f83335ffefb9ec6e18497c27cdfbb13d0f38d07cb6e24ab9bb152b4515d3. 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/AUGBT2321016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5865f8269dd592d8853ecbb9d7c7dee1b20be4712e5e0a78b961a12a63ac6dc8. 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/QZFZ62441774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f82cd4804d3d658d03f8fe44fa2f4fd8ede14f13a5b23375d2546274649aab6. 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/QZWFK2387390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2861981deda73bb54a2c567a02786dd7b8a6dc025e3e998ec47873994bac493e. 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/QZFZ62408333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacaa26d12c583562c0df535a8c08556613b4cd88cf3d4bff535b84b6d07f1ae4. 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/QZHN42445639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fb10fc009e5d41aa59320e9c664edcb530b8371733a2d458506c4c0cf022f5d. 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/QZK6M2440193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x808aeef31471bfcd51001d634163c9f935ce4dd4eac7f7ac232b5ea5c96e1c07. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-17T00:10:24Z), 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/QZNWS2466815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8bffd4d5cd590a46df99f6cb65523aece6b4833ecc8a56c61764b433f585fb5. 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/QZTAZ2443339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x751bf2bfee79a240b557860ae0fed92f77f1f3c75084ce6ec317af6904965ed9. 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/QZWFK2476144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd35d589a391496cd03f0266f14d898583c9aec34f21ee68b8b77d4cd3a4ccdff. 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/QZFZ32552802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe8b200a3b52587ca4641a3148b6c04532b77e391a08c88c19ed5dbda3c4c6cf. 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/QZZ7V2449679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4d32d6fd6a9955113f5fb332c76d0a6899da555ab70ca081ceb2fa108e3c6a1. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZWFT2402605.