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 0x26d514231ae2fa943df46894ee87013c28ceb5c3eaf44e00dbd6c6a7f860512b. 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/bc6ebf5c-1044-45ce-a532-34cc0a9ce2ed.json and https://artists.proofprofile.net/proofs/artist/bc6ebf5c-1044-45ce-a532-34cc0a9ce2ed.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 0x0cdb2965bf117090f582e00a4de3f3da2376c4ecb606cca591cab2a90b5b2df4. 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/QZPLS2144435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8f573a63eda012d8e4260c75d2d6b683d1a44cc831a31e79b6ce682a9cb5626. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZFZ72239816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6dcc9d941c32ab8d218206a4d8bebb3798607731aaec85d21ffc56307d5a767. 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/QZMEQ2297344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc87688ada3c05ad81a022bc9883b98f7561abcc114a632947e99df7009645306. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QZNWT2201384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa731c65c02ea2c8fc68f13f7745cc1c88e170400847df8a412bdaa09e0f0c4b. 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/QZMHL2370529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd549a249b120c5e6e8eb479179d8963ecd099fedab2f8cafe7288784b442a612. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GX8LE2309518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa731c65c02ea2c8fc68f13f7745cc1c88e170400847df8a412bdaa09e0f0c4b. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZMHL2370529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb607c4a27bffb78e98944048587bcbe85c054a8cc026aeba8fb63cc40b3c9ae. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZNWY2234557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ebc0d5d6e79b703fddae791f2c4218d4770246f4ac5172e4b0d29f863fb7050. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZMHN2232268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb872a1f32b706342491d003e275a32f53f3eaea0c762d85d5020748e87a46e67. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZFYY2217659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85840163e65066d165d0c309b19993c481757068879c7f8fe33bc0a41847423f. 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/QZNWQ2229212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8d7bfb4177fdb23c159a2bbcdd3963922841307a7d3fec2b862fdbf73f2d44d. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GX8LD2218962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c7c5df1d002bcef54131f92e77cf46d0e8bcc558e3e52ca5bfc5b23a96135ed. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GX8KD2247693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b14c49b26142a3e38ca219b8047beb1cef5e7510a08a52a3ea2faea8c124293. 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/FRX762367368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabcdf82ec4721caef8a8e9b00b5efe8114cfeded6742611c3af0765d673f7572. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZK6H2240542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca303e64abf0467e3d44c3ab929e4eeb038d56f7f3decfe1e1505774c1bfbee1. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FRX282395183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdf316285ecb82f11e1bb7bb9ff0e4b1afa663895aacbbe45905725e0e5c8e9d. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/FRX282395185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc81a98fb021488e9be3cfd1f4fc9a1767dbed5ee37923fa108e31258483fdc55. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZS642369864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8265980b6f11bf64539acbaa8960dded9bec06148feac2373f93a3f3128e8388. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZMHP2415240.