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 0xcfd8558bafb2adf9b9880d7bead3bdee164097b9872ebcf79a07c2d9de24b751. 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/bf7e81e1-fb78-441b-869c-3ec3c4bff38c.json and https://artists.proofprofile.net/proofs/artist/bf7e81e1-fb78-441b-869c-3ec3c4bff38c.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 0xbb7356fd45646ef1b7f83176d04cdb7cb12560e3a12dcf15c53c2fd00d8810f3. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/DEYX82242330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaee40fa0543e7815371a35e27ceb9e189a09ee20ffd0af2c4ad1dd896affc01b. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T02:31:22Z), 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/DEYX82242333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf1fb6588128880202b908455c01141aafea71912ca3a7ec81c15466cba53957. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/DEYX82242334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76c871f00490f779de7d146bcebcd82a7a968c5ada4220dfc4c4e1b1c9d31efb. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/DEYX82247052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe79f59b7331d01da2dc1734d3622e3b3674fd95c6d06e511b4f8ba4f1eeed2cc. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), 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/DEYX82247045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee29350fc1b72c84957ea601ac441fef93766ce042797aa1a6cb7420b49ab997. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/DEYX82247046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11385bfaa1b3235092c4addf4d5fde5dee0b17e1e0391dbff29af0fc9aeb2114. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/DEYX82247053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedaaa2efe4d1f24f4e412196ffb0e0e991e36196f1fca29ba98e73c02b1027d6. 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/DEYX82247044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14176d89a324117c3e1754b594db6f4162c7bc8886705ae28a525344182c105c. 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/DEYX82247049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b7fd87df4dae58f4dc46d6241448c823f6a35ed1d10969d8a23b65a3c784a1a. 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/DEYX82247050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x584e7b392852ab02b29c7a97335f11757a6f0b273dc3c9b140a6b7a21a58e4da. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/DEYX82247047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b7276be762e226ed0af6f112ec69e7ae5889fb06384c1140f0a2f17b6736067. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/DEYX82247051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91f09b57b263288c79f404197c8a9d561752206a4cb74bbfc558c09addbbffcd. 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/AT1962501005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bd2e44328c3bd4f4b6cb2668258da4906fad7e79def3dfb9c75a3428c62965e. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/AT1962501006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x915993407ad13f90e0ab7773e2301580ff9cbbe1a798e30bd9b695a53f9a7878. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/AT1962501007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d8804e5254b03175f96c92fa56ad79bbc04feaabac78ebcf29dd2e1d7961b7d. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/AT1962501000.