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 0x68259b81d299e49d9b2f28c971b44a6f17e5d55c7e9984cd51d804d0b6d950ab. Chain 2 (Bitcoin): anchored in block 953889 (2026-06-16T04:57:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0dcf9536-d71c-4e0d-a5ac-7c0740d1f4cc.json and https://artists.proofprofile.net/proofs/artist/0dcf9536-d71c-4e0d-a5ac-7c0740d1f4cc.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 0xd1ef4ac40c4b26e0478fd18e7d7310c06279a5a452f25c59333fe6f04e469c02. 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/PTNF10610220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75616a7b27347e002647c77ab6ac70245cc9895f15feb6a34afffd8cc9bee95c. 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/PTNF10610226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65aa0222c4645438df43ffe4ae74f508f6257ac17ed99fc01a7bdeb17128770d. 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/PTNF10610227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6a56db31db116e9c1a2a0ac62eb1d3c975aee0c90785ace11385c5627aff5b9. 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/PTNF10610229.
Capítulo I- Passagens Pela Cidade - Parte I
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d3197eb143ec37cf1defe9632b7679bce930df57afe037b549da18c9a1188c0. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/PTNF10610221.
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
Capítulo I - Passagens Pela Cidade - Parte II
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde7dbb02165761f40332d1fed487f350922c24dd7ffc3556fac94817445e5297. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/PTNF10610222.
Capítulo I - Passagens Pela Cidade - Parte III
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaaba30e8aa11f9a7ee54942c13ea1ebaef7ce64eda82814a0984286a7bbe13d. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/PTNF10610223.
Capítulo I - Passagens Pela Cidade - Parte IV
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe787819cbe6437af4dcf88ca8778a47e3dd1290cdb714788adb3d02c18742076. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/PTNF10610224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa830b08d7fdd898c75c0c60922f6892ea3f6b8ba1425c4e5e3854ffd7357e2a8. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/PTNF10610225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x679fafc3fa0bfda69eb24a018d1eac12b1a12335b8049a7d52300d2e267dd28d. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/PTNF10610228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8bc7d7847647c09ae4737bfb139d023a315a682d7dfb8b4d8ffc6c5bbbf09ef. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/PTNF10610230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0db60ab46153199c6005f59916a358f0992ec0b936a4f2a4305f4a811aeb89b. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/PTNF10610231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dfae7d62983de0a3b0856bb0c9c28d2318ed868bffe82ea49bfff885eaf837b. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/PTNF10610232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab19210db196918e79c6e88b3f5c471a6f040d9aef19bce8c6666f8839b7239b. Chain 2 (Bitcoin): anchored in block 960381 (2026-07-31T09:50:11Z), 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/PTNF10610233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x268df79fa8ad8e0ece75f6cc2486b72a6392e5bb6c51552d7fe8b544515fd6fd. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/PTNF10610234.