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 0x7c984ad1e20bf4506b3717ad3b700f684a432f79263e34120008d5665ca344ef. 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/5a26fdde-45db-4148-aa12-4dfff8080fee.json and https://artists.proofprofile.net/proofs/artist/5a26fdde-45db-4148-aa12-4dfff8080fee.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 0xd4e95511d35e74dc3ac4ee7e354c9495b813cec954c73102c3b0d5de24e264f3. 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/SE5W32308459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05485496946bcf9465b684539ffb7238b37daf682a2ec83d9788557b92a7659e. 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/SE5W32308460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24c3cdddb617f64be7413c831de08ebe804626dc5db68031b069678c132063f0. 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/SE5W32308461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x997f57c77c72220b059d9bc6b7897009c87bec8eb1a7dd06cba2cb2abefc144e. 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/SE5W32300422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9431affcf060ae089929ed02c929bf1870e475d1f8a54d7f0bebad47eeb95729. 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/SE5W32300423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b2efa92af73e9bc716b0f83057e4066eff9d3c9c57d373dd8254bb60357340a. 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/SE5W32300424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x541139337c9b82f4c239c8f1ef68dc57881d9210fe07c3cd6922693065949425. 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/SE5W32202896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfef59410592be003109a7dfce048e595c3b3a951a4e9187643dce2ac03e0357. 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/SE5W32202897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff3de52787b01432c476f727eabeaa242729fcbe0f2380b93c96cacb39e0dba7. 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/SE5W32201834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x614f2ad0a332b5d6cda3fb2529052b86c7ae23f787c92fd7c9bd1218a1b49840. 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/SE5W32201835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0831a7bf86e6429ea8d9ad5b20bb6f873e142a2d1ec9b1ba15efcacade5cb48e. 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/SE5W32201836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe606a77727f3e3113a29a6068e85a57465c2ff2ff69260b555c3e1e8ca9c5816. 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/SE5W32200402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x583e875aada7cf16831c65645d21872618235ee9c27e67a6027e8577167262c1. 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/SE5W32200403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8303eab6348a61e9a7dff29e1b9aea5c5abe0c9a022e9f498eae37f0d54e218f. 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/SE5W32200404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfe5c6e3af43bfb4067ef01f4e9275f177047dec276a628e96f605197dc43f7c. 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/SE5W32104158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x176d1496b23422ad7ea3e7675735098bf236821058d067b22e0e1b5e233376d0. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/SE5W32104159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a9704340e2ef511e316a5d84e68730c72b483d7cb7d87dfa0df3b7c1a9b84f6. 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/SE5W32104160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fdca0dbb5935b264f469411754e675a213085a55a2bba80250efe0df031b570. 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/SE5W32103008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc28f3bf2d818e65bb2ba286eed76c02427013cb2993137f3f9e804447d2c9f90. 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/SE5W32103009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38a4011d5c2f8ef2dd83ab488b7adc0594142e5a7cf1082e4a25ada618c5e695. 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/SE5W32103010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8581f71bc2ebe19dd045e9c6c3be32f5642c9c0f987fd0fc72b0b8442a1a6a05. 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/SE5W32101414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5c1e066c2da7145936ee330393e897dd1ce30cb7cf46955c58e0758b1e82a00. 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/SE5W32101415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ebd28208109aad115cebc14d79922fd2d2fecb8e2fd3469d0497a02c2e995ae. 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/SE5W32101417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66857a9ad587619c422cee9ff2486ae2a9fccf9823a5ce22e5fe572894702cd2. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:06:16Z), 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/SE5W32101416.
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