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 0x765acf17ad88ad28a033a3fd3c6f8d4e3b2de9249ded1d62b9bf054d1e514c4e. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d10f6661-cdd0-4439-b224-dc5c947fd283.json and https://artists.proofprofile.net/proofs/artist/d10f6661-cdd0-4439-b224-dc5c947fd283.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 0xec39f28793ba4b0297e4e7bb6ebf133ad20703c970391f6d4a3f166221809680. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/CZA231500285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68d1c794c5be555236035e530f01e89cd451479461d44b6c9b7bc9ff86c78b1e. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/CZA231500300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27afb80dbc53ecee23deedde061797a9ebec01dd0c8e01e008c5fd9651422051. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T17:26:42Z), 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/CZA231500303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d0e7a96d8048da2feb738932c7aab39449a44904443d0f61f81aa175a68fe49. 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/CZA231700209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd40ca0d7fea3e399ecbed26705cced9abea7f852f2907a484056209e792d7528. 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/CZA231600129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x303ffd98d002b4617b39285b9814d0761639edf89f03f42ce2128cea6ac8d3ce. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T15:42:20Z), 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/CZA231700368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfc80d33ba8aaa61f4f4893996919cdc41e3318a9fe111cab4c7a074a35f24f4. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/CZA231700371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf586b2509b1d749ffaa20a975cf210203a0a23f00d4d48f8afadec6597b61fd0. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T08:25:34Z), 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/CZA231700372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc109799843b494f0f1b3a6d32c31728bb2226758598a5b51b43403fbaed8eddb. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/CZA231800128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x778fa50e68b513f75cdfd1e5a0fbac444d4841a5136dc9251641d0735ef27934. 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/CZA231800556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd398f558fe9312be16265d5546201cd0e3c456fd0aea7f4feaa4ea52329b34d. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/CZA231900384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd906423b33558e9b07bfb8e2273aa1432e436fa1602235b275b33712a2429f8. Chain 2 (Bitcoin): anchored in block 957884 (2026-07-13T16:55:06Z), 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/CZA232000586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd398f558fe9312be16265d5546201cd0e3c456fd0aea7f4feaa4ea52329b34d. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/CZA231900384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7043bdd821e11e0b63bed9536faff4cdaa0d821fa1eb1770720ef38c525ff93a. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:33:16Z), 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/CZA232000532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cbd76957c0a9044498af00958bad1fbeadafb964bf5af8dde4270c860f637e6. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/CZA232000533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb140055eab2d6f77eed53e98bd4047b0d69d9045ad51e8ac61dc37ae772ae9e9. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/CZA232000535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b3ca9854c7a1ce28634764ba75a1c0e7c7175e59a53a2d305dd6fdd26309bd2. 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/CZA232100228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06d32d751261fcd89cbe64a5943e51e084c56627cda64d221afcc8dee80443c2. 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/SKG151700410.