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 0x8cd5f6ae786bbc0d591e57a24408fdeb1712a37e1c7299fd32e204a12e23f9ff. 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/3b5bd1e7-adb4-4e87-8ed0-1c7e7b38cddb.json and https://artists.proofprofile.net/proofs/artist/3b5bd1e7-adb4-4e87-8ed0-1c7e7b38cddb.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 0x26b4738a505c1f3eadeb5d8971cd0352cd12042c0524c93b4f868e53800dbdfd. 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/USL4R2160467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3aa62cd5c18093b54476687e61fbb0efdb8dca21be5bfad046faace7e15db569. 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/QZTPX2210991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcc3d9a6bba1b2a877b1b0460490de5e00acaf5228230a78aed06fafa834e216. 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/QZNJW2276820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ae2d9ab835188eb375de4e30a29ad339abe5cd862b7d4be3215885c3270d6b2. 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/QZ5AB2269875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21b58bfbce133edafde2c0335c3da0d93a6820b9bece2f23162367911bbdf1f8. 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/QZ5AB2223462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9133120c95760d45523a4c5f014dae7deaa175e9cf651f238d3c6d3324fcf95b. 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/QZK6H2022316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6e959174878104b15304c51990194ff35b0d4426b31f16fb145cbeb0d22116b. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/QZFYY1994609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3283ef322b0cd492f79232d57ed32c3920fb8423105504112634138ac0826904. 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/QZHNB1988085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b7c4232fb0265c505e679e9fff7259410404312d248cf7bd3489ce251c3b5e5. 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/QZES91953639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51bd1452241e733409937ed33e38084fe28459b95659b5251b41e66a60f98fe8. 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/QZDA52117987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf404753a2da35db03870cc436a8e3adeab82e9e6ed2da482a3f6c0497328f7a4. 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/QMGR32243707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5241be8c0ee2cff7a42eabc0321d0e8c3620ca0611a16ad22424967b5de3c9b. 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/QMGR32298904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05b7db70533c17981779a711b16ce456406621f0f36923efd33fe21c71f28696. 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/QMGR32289435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66c99f2e1774c031363fd5ddca82ff71b8309817ee62e0992c49ef260404f9dd. 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/QM7282004738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36f11ce02baeb7e43df1e6300aaf823bafd30512ad125840e3e06c3cdf4753cb. 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/GBSMU8276898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16fc9c79a5764557ea1bcacbec476fa017a5b7650ed228536c6547c2b256d743. 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/QMGR32071000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a25ab797323d987c8143fa02d21ec06aa5e74ce56325bbd888c14076e5fa109. 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/TCAEY2045240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1d58e2d50b2a146435b0560e03a1a300b4de0264e5596273ff568124a16f02b. 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/GX3Q92093391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x292095ba0f85ad4db1c1826fd9ace16b0d0a463c8e608d22a58d6c3ccd44357b. 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/QZTRX2455091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3cc502b751e3d82820ee5fa50f5d7256f00946b5462a50b4c29b5cfa015ca55. 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/USL4Q2153146.