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 0x260b82e2621ffa063272d2fe7f97f35f04cfac3429379afb57614f0bc7a765d1. 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/b0b7581c-b9e2-4360-bcad-355f5a22c1f5.json and https://artists.proofprofile.net/proofs/artist/b0b7581c-b9e2-4360-bcad-355f5a22c1f5.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 0x5522ddd898b160897ab66a25ccef4af01e1ed09a5b6d8593364f4b493766727b. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-20T01:26:28Z), 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/DEBL60408871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6726a317f23a4fa1e405add8a67e19d9341c5e6b4658de346e6de9fb3e914fc8. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:32:28Z), 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/DEBL60408872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07a29334b79ba672059ae9e71ade0ad92f7ac45b53067d609a74e1af4bc40201. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:05:19Z), 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/DEBL60408873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b89e286980008eb68c78a5254483da20625ee00642d16cb78ed7f14783bf9e9. 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/DEBL60408879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e2c61e4bc3fee2d65f8326e17153674b7628b4be7022bf2c34a0af60bd49bb7. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T06:27:23Z), 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/DEBL60408886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22efd40ab05b7e20a4e0028e0aaabc4f465237ad731466f6fb0a53d0c0c826b2. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/QZTBE2531799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c06a4d6d4a292f8b29fa51f561194404f0181e59374e3fcc24d66102aa88adc. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/QZTBE2531800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e44952fd0b366d41674230a5d915e6aff0995e1a1c0fa0addcaebad622bc34a. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/QZTBE2531801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0866017a1a51f1fff51c6475646e6b3f8034a0a8dab27d19b6390ec551911317. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/QZTBE2531802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dd0c7433aa2bdb0ad72206123745309872fed32bcf13cc20c082ac76c45f16a. 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/QZTBE2531803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d57fb618318a8a110f1f01a2660bf38e5f9468afb5747ca93b974066f8cb564. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/QZTBE2531804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44196b4e5bff9aaaab5e3ea58cdf463cc6e3e43ad9741d1f4f0faefbb0fb0235. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZTBE2531805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b799990400ae25ff44d3cfd883a16a98f0157720304995a0ffff299316fba24. 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/QZTBE2531807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x629c2ff87105084cadf11b7a63a06dbb0779b49855e8de77161f3178c03f0399. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZTBE2531808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ceea5b3a569e0bee7f79b1098dd9ccc20b41b11099db0e4622b01753296ca0c. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/QZTBE2531809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x110b67872f73f2ece71f2f7fa08dceb4719f0dbcb99c77d305ef2605d2204355. 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/QZTBE2531810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e40a4d2c5607d5869ef8d6f09cb87c5385e9cf30c8f211323e5a97288081238. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/QZTBE2531811.