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 0xc08ddaa4429e8c6804f3f4945ce6b7d8360780a0dd3444d7a92bc3325b16fa77. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d03470d3-fb4d-43be-a886-ae36aafe0b27.json and https://artists.proofprofile.net/proofs/artist/d03470d3-fb4d-43be-a886-ae36aafe0b27.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 0xda0708e849737cd7ce11f5a0f37d66462b5f43c6ae4944cb86d162813b709fab. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:00:31Z), 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/QZWFM2316785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe968f1cff7c4f23b55b4784a2753052554997f5da8b928a56a6d1aa08a4c3942. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZWFM2316786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2be28fb83f4851f717b387d916ffd189d9b74dbc1ee2529579b0ba1cc5a7a87. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZWFM2316787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2789ca18bb533ad7df654306bb863005f5f3d627b2e76fa7bd1ba0647633c9cd. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZWFM2316788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf727d83dbb45ff40fd76f84e9e147fad99691448f46bdf9b452efbc247fa215. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZWFM2316789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafa60c13824d34be63899f20411e16ecd4899eab50cadc0994d6107ba65be115. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:28:20Z), 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/QZWFM2316791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd013ff29501fd4dc62a8ec435177d1bb3a58aa2583621055415a2f5ccef24d4. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZWFM2316792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6001caf8a489ae588924835e2f261f9694e5c36f0f2c09ccdff21936d5b7a8aa. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/QZWFM2316793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x196f3b105ea6c6946f01e0ac970364ea86c1e4767f48b8a3bb9b497bf2f4fcfe. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/QZWFM2316794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5872d5a6aa094c71b611cd1094073c8308d8e8022712cd7296baf2d3566df4fd. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZWFM2316796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb362c2dd8cae4b78e247d383ede0c972f7426a98950cd40d9e03e9e55d9b714e. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZWFM2316797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb23947c4f9e2158ac2adc52d1f6491774997ea1260b673f1901286bd17c2a04c. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZWFU2429141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6e88a1b3f718bc57f0a19fb2a55dbc4bbaccade4587bf01ecdc91f6bbc627bc. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZWFU2429142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d5299e9a1e942eef814a733821ce66dd021258e6a422272a67de49812e276a6. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T06:54:09Z), 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/QZWFU2429143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf93e8b32785621bedd5d1da1810760fecd47dea1681582cce20df2c0fbc6fb4c. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZWFU2429144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9e7a6faf9d0721c6b06318db670f1859a66978086cbe62b3bb7610dd437741f. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/QZWFU2429145.