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 0x69dabb6f038cfb86cbcd3de9309ce2e9f118c0f42653ff728b321c128b75b3f6. Chain 2 (Bitcoin): anchored in block 953754 (2026-06-15T06:45:19Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ad29faca-ba7e-48ad-bbbe-b70300aeac08.json and https://artists.proofprofile.net/proofs/artist/ad29faca-ba7e-48ad-bbbe-b70300aeac08.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 0xedcd5429e96ef30049f8ff704d76573323e17e7e0cebf63a8a214a9c99e9f2bb. 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/GBWUL2525146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x416d368e200e5bd04952819a37a124c8a5eebfd2d044f2e3de7f87b49ed59f83. 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/GBWUL2525162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87f5e2d6a2973d09e113c0476c0776c0d0628c810bbe189b21f54eebb2f42b9d. 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/GBWUL2525175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f60b617210795098677f67dc6b47c74abe72faa335a0a7e466ea2b0ad2c1acb. 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/GBWUL2525197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29ef904ecd2ecc20cfa2c9a50bd146a159ac1f5e901b9f4dcc009c2ef909ea36. 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/GBWUL2525205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cac18830b81bd2a249ccf5506515d127d86280f5d8594b9d0946cf82a6d6bbd. 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/GBWUL2525260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7f16f0ec2cf6e03c82fd5fd2d785c8843c75e9e59306f153d4a2b78d7c3a02e. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/GBWUL2525131.
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 0xe0adc3d1fa66c62d3fb13ed41722c9c5e2220344b0ee174d7013f1cdffc241db. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/GBWUL2525138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x071539c0f2ad6379694a15e1531ef55fb0e21414851f0b1311061fa97055f819. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/GBWUL2525154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31464792a009e744f39881c82008d5173501abc1259381e39a7030c941c3c574. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), 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/GBWUL2525168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x989b8d12aaf8df86723df6c7a2c08db0d9d63b4647ea9ac16135756b26e77e5b. 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/GBWUL2525182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x997fb25ac8eb9c20f2c36adbbd6fdf0b5f387878c2cc5e357149f02239ddb4e3. 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/GBWUL2525189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cb93754d31bef18f52c84e1f107e017669750b1b2059fbe2382f20b2ee9c111. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/GBWUL2525212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd77448eade9da284fd6e89b23209e566d9a2b9ed46b44d60db6d9c3f580d65ae. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/GBWUL2525220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c4adf89f0ea0de3a447e0579a52decf305181e27539bafdf9663a5d8b8a582f. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/GBWUL2525227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5417423f9e4cdafb3a6b7bb69f52b6df503bd71185b9ff9c8a90866fdaad489. 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/GBWUL2525236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84849a6a6e79db732cf780ff51bc68acb95a7b322476a1213404f730fb5e7604. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/GBWUL2525244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f9c896d1c191896337caf90b72bd1cf99199c5a1003145422f421b05c991ce2. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/GBWUL2525252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0720f88e6fa8371a519f126023bc609f7bb5bdff9e7478cf94097f05f1dec446. 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/GBWUL2525267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb152ff920886d6c8d3479b42f77bad80788e429dfbdf4c3da02863365a54a161. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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/GBWUL2525275.