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 0x53b97c31e2482b8df8ff192ba36b1995c31656f2ee91002d248b168aa955c6f5. Chain 2 (Bitcoin): anchored in block 953596 (2026-06-14T06:21:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0a115dfa-acb6-4c0d-a3eb-724e406eaa69.json and https://artists.proofprofile.net/proofs/artist/0a115dfa-acb6-4c0d-a3eb-724e406eaa69.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 0x57ac6b4ebfb0690fa8560f6fd42120ec52ee60362507721e2136777faf67d972. 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/QZTAS2426326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x546649cd8143eb5f06b970615684a80c5c9ab86a37979b5099b8342c3afd97fd. 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/QZTAS2426328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08fbea054f52e3c0fee4ec27fd9468d330989c1d8f3490f8f72273e80eb420b6. 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/QZMEP2414960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0b6871964536acdb2ff47bc8f09cbd40558f353f0b50fe216e8b332081853f4. 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/QZK6M2454007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde4678afedad4517e66d37852ae84dd138695d68af4664fa327a20ea85b51dcc. 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/QZDA82408786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cb416e8e20546023bf5043cf35fc615558e216983830f3d86f72846d371f669. 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/QZFYY2457534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b96acc454cad5ef98ee10d3e4c1b781ef8b08962f40c889700a4e49f369ccb1. 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/QZWFN2303529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe517ab5178fdec99f2d69032eb83f595428ce207c8dcebbf1b1a44a46c70afe4. 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/QZTB22384759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9ade5ddf6ab9d6186c0a9c8efee72a3a926edc80a6187011bc5ce50d7cd6672. 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/QZWFH2362716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbeee83409e48ca2de4c4e480eda45df0249807cfb5a17ce6bce2bae511bc0eb. 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/QZWFN2303530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9ade5ddf6ab9d6186c0a9c8efee72a3a926edc80a6187011bc5ce50d7cd6672. 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/QZWFH2362716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0434aa2ab7a69bddaaa62b82dbcae76cceb0dac5ceb029bd1628c3351d5abf8b. 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/QZTB62330177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe517ab5178fdec99f2d69032eb83f595428ce207c8dcebbf1b1a44a46c70afe4. 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/QZTB22384759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39b52f35497b59c4eb264c5039cfc7a2cf086a7149943545e0f0f9c9daa25756. 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/QZMEM2323271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5a9a59e88961c1bbe6ec42e3a64c8139c5fd444ce91a55b6535fc80e0130050. 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/QZDA42596086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd82a30ce4c6d5dcf65a5413d11795bf403ae83608f05ac8399b94d5f091ba744. 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/QZZ7X2465172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97ac0c847a30052f8ac7534b3e1d42b8e05aeaf2180ce761362f6b9506b3f3fd. 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/QZWFT2428958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d2e0bbbbf52f5fb2a86e82f56b4f76974e7cbfaff24ea2776163ccf3750fcd1. 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/QZWFQ2496839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe909c6d339fea373cbd5133e2a67d47adf23937f04c3984d6ee4bef1262b53e1. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/QZWFT2428959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d2e0bbbbf52f5fb2a86e82f56b4f76974e7cbfaff24ea2776163ccf3750fcd1. 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/QZWFQ2496839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7262395af4f07e440aadef2ca08d7996bcc08423beb15bf0dfa87c3c0ff52109. 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/DEZC62462483.