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 0x766444031d9910d3083592479489b865cb682d4138e923a1335b4ef309959e56. 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/ae13b2b4-d459-450c-ab44-d586579609f3.json and https://artists.proofprofile.net/proofs/artist/ae13b2b4-d459-450c-ab44-d586579609f3.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 0x3673b3f132d7de45a1a968c0703a760a5c6345132322ed3fda87ac82f6898e25. 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/ATB151000097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x587be5fde91a8c569d67477a5ca10988de5dfac5755186d12f814cc00ede9606. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T17:15:45Z), 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/ATUM72300134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaae768ef95d01046b32584abb141df6a91b71f2e8ede59e817978665d1387fd8. 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/ATUM72300135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75cfd90cbbfd0fa5bbc18f4003c265cc0824901d85acec24d80b61c54ade991e. 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/ATUM72300136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13294a5620c2af54a751a7edbb40ce6de6673337f0644b25b68e5b87bd20b7bc. 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/ATUM72300146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x365b007c86c8c5412839f51cca1975cdd9e0c3a8c680ffd5ce687634cf72d277. 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/ATUM72300148.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a0ffedab4dd3325d6249897d361f57cf1ce16a9a95c99a47d01e4294cbae1f7. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T06:39:16Z), 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/ATUM72300170.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa34473b032bbfd1baaf90bdb0fdd53e10cf5d70e1f236bd3cf698ecf24ee96e2. 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/ATUM72300174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd12b9fe0e15d685cc5339efbe3a94ad5880c7016781e9e7f56e57ae6b78ae0e. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T12:32:37Z), 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/ATUM72300176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86cdaf4df18386353111484f1bd33f2ff1d7e39ee1ca0b03e0375a239da30070. 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/ATUM72300178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x774950854e0480955c8b38f9e88d25a7fa55e5ca07c92c32440a2c9116555846. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T22:15:46Z), 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/ATUM72300187.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd45687b55769c6014b8ef40f4ae90fbb2e368ffb5c1a0abe94260c1f6da31917. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-20T01:34:18Z), 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/DER541805611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2925a21b56e21abbeebd5d0590149e853e85136bc39e541a2692a3960b1e60cd. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/ATUM72300228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9544c6fbb971d71179ad1e0521a7762c95a894d094f11ae72130e53c950d44d9. 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/ATUM72300234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b4a00be8f101c07c569d57d94c69c83fd58f7eb7da2874b4dcd9bb316ee9564. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:06:20Z), 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/ATUM72300227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2925a21b56e21abbeebd5d0590149e853e85136bc39e541a2692a3960b1e60cd. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T23:41:06Z), 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/ATUM72300228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64a76cbe902285610d40ef60604593295b61822ddc7fa3be0d4a266d0b268705. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/ATUM72300229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x934a6bb41b936495da098efa45c25a83171a2f369bf5d6cf6de96cb6cc2ecea8. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T19:01:53Z), 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/ATUM72300230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5566e99b77669aabd09e5e09dc7376fbba734a420a18b6669cd9f71db18b32fa. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/ATUM72300233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9544c6fbb971d71179ad1e0521a7762c95a894d094f11ae72130e53c950d44d9. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/ATUM72300234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c6bb8d0e008bf51bfa1dbdf1b5a039957a61c956bdd9add2861a3d6fddc0d6d. 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/ATJU42500002.