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 0xa25ac191553c10b6a6c932ffec2bc2862bd9242ece45c9b4fac40507e091ee63. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b069a458-f2f5-4c4d-a7d0-5898c7f66727.json and https://artists.proofprofile.net/proofs/artist/b069a458-f2f5-4c4d-a7d0-5898c7f66727.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 0xde86c3bc062eb56f5aacc046fe5267bf6ce60676b4e36c02981b85e56989b846. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:30:25Z), 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/QM4TW2038466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe43c89ef1f2092ea274a189ca83eed93e3e2a6ca9ad56ab2d007dbcf12348783. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/GBB7Z1200058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf62003e14e685149de34a18d46cb978a6524aa026d8edfa63b18bc4489f33691. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/GBB7Z1200093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43c04a28ba64542658952a616e9800e86ad277f9d9a3ea28a531e4dca9f813ae. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/GBB7Z1000002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fe2fe9ba5752e934134e6497648c6e68d48dd9d211cde5e362c8da0eb255815. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:11:38Z), 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/GBB7Z1000009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe30c6f7e984f0682caa7e6a57902a13bb8653d1b91121e17fccd4b265fbefab6. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T05:23:40Z), 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/GBB7Z1000012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1c417d05988516ae6a78e16aead6a6a0b96786948297f74e84416dadd67909b. 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/GBB7Z1000021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe008d8537ebd2561ceeeb2acb343f6a36ba6612a4f9ae348315db4c878265c19. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/GBB7Z1000025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f8d425c6311f10c124054a5df2f18dde01b90d61d54e570e0f434f15c0cc3ee. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/GBAAU0302287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x188b52042876be8fe618b62eed603c89fbb80726d398f300b15867c9b4023a5f. Chain 2 (Bitcoin): anchored in block 958689 (2026-07-19T07:11:11Z), 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/GBAAU0302288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda0ba9c65b5f4d09152b7e1f7e1b85053776319493c88faee5cc11638feeaa02. Chain 2 (Bitcoin): anchored in block 959071 (2026-07-22T01:02:32Z), 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/GBAAU0302289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x501e2405dbf35a085e35838b372379ea61c772f3c89733a6be0d2a0b20b1a253. 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/GBAAU0302290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6810dd3275afc543692639e8aaa52b9a4e2fa889d9fa25f2a4477d2f4422ddf. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/GBAAU0302291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b82c4586dbf4151ff762f468b643351853cc10ad1bb048b69b1f8323fc9535a. Chain 2 (Bitcoin): anchored in block 957603 (2026-07-11T20:26:17Z), 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/GBAAU0302292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8765257ff1358e457840201c300cc7cd8ed8dc7938e4edb7537304c640b0ec58. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:04:08Z), 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/GBAAU0302293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67086cb4f071226d38574b675095a87ba1cf6e028ad8c975435f4b5d973b0f5b. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/GBAAU0302294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5a2718df427cce340b1bdf347809de2541e4f3cb03665baf9e8f45ea530f29e. 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/GBAAU0302295.