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 0x620597474b05d20123e6025e7150805a9512ea8c14b014eac6514ccd96fda756. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/56d3e7b8-64da-4cdc-b8d5-ce67b4a9ace5.json and https://artists.proofprofile.net/proofs/artist/56d3e7b8-64da-4cdc-b8d5-ce67b4a9ace5.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 0x77e3dddc8d16951b4e02148ff341ca6496052f6c938b31bca1287702e9b359ea. 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/GBLFP2063210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ba64f59630d809d82efcb393d5ecb44dfa28828e7dfbe31dde4d7d263c8bbcb. 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/GBLFP2063211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x775d5a7ba95ad86498fa7afb65605806bb0ff33801e3abc620f40ef1ee48e200. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GBLFP2063213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44c4092f135121749638a41addfbf91b9173cc6136973db9aed02de2fc21bc04. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GBLFP2063214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad8b58feed35f61052061336609644bee90eaf5a1ec134539565231435328136. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GBLFP2070310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34e9bd7e3b6dbf639ccdfb961d923102938e70f6844103649bd31710f627eba1. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/GBLFP2063219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef5de0e02f3c399e87def0d192aed82f9ed1e63adde14a2a096a682e47eac5b7. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GBLFP2063221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac1502d64941cc10064d9d9a71e18d6aa2b68906706228a3b2eb151a17d5209b. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/GBLFP2063207.
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 0x6a38297a3a520a2029b20eae44b86016b0e0505975f09bcf0e0812bc2275b9a8. Chain 2 (Bitcoin): anchored in block 960259 (2026-07-30T12:51:24Z), 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/GBLFP2063208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x428a97590965e22db69f643ce3cc54d1e9f1c63781df9a6a4f3e20a75d811d20. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/GBLFP2063209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcadd1a6797b3705a3134b441f39b6d9c3c25005dc8e7e668d17ef9747a4244ec. Chain 2 (Bitcoin): anchored in block 960311 (2026-07-30T20:45:02Z), 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/GBLFP2063212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26d955b93a4535cdb62745d46a23578724113f2910078f8d40d9e8a733806a4c. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/GBLFP2063215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36c6059a29358df2a95e004e3334e69e399fc965d64026d314c1ba2fdd0c9a01. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/GBLFP2070351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d81a099d46d7205d3b7737feeabfdd222b684e8bcd372870e695656fb577da8. 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/GBLFP2070355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9987276f5e70cc4955ab0f7e40489dae4e53a99c6967ee93d60bf1668e2a8274. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/GBLFP2070349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ea58bdaaa4a65c5108b5d337157c81a1de6f15206b7946b5b3a383fa737e8f4. 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/DEPI82207421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x508aa92aa81baae298126f960327f5ff5ed86e206dfde18ae99ce498bdea7300. 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/DEPI82207425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x782751d900c1a27b58541343860476ddf4cad961cd7eac511ed7dc39dafd6812. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:52:52Z), 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/DEPI82207422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9257003e36593aefde878b9d8e9194068751dff065145337446019d34e311479. Chain 2 (Bitcoin): anchored in block 960218 (2026-07-30T06:57:05Z), 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/DEPI82207423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1040a46e4ba4d5077c37644da7f0e5f9146042750e2ff1c0ddd5ec7451c984a. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/DEPI82207424.