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 0xb6df350b4452489d87994c64ab45daadbb398eb0ba26cf6327b6b508bee75a06. 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/d16fa683-0385-42b3-b659-e563fbbdb9dd.json and https://artists.proofprofile.net/proofs/artist/d16fa683-0385-42b3-b659-e563fbbdb9dd.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 0x4c1756f477fe8afec3652d4722c05505a91f77e1e7ea6220133aec0e4ad1a600. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:44:56Z), 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/ARF049602763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ed99d6a59124c2377936db74e7cfd7087646702013e40277e25a7df4a3bafea. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/ARF049602764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9776116b0b8f2226a45e4946a0996780d3184c00283788e225ab790b1a9e51cf. 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/ARA821000479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf357e9afdde1f3fd303291328c0e623b90fbf68fe6fca46342ed6be1a8db18e0. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/ARA821000480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36c2dbb4f495510f26ba6ccc03b5977df0ef3c5c487b4f51b705c24e33025fdc. 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/ARA821000481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cf6149a013f9cc2db7b50abab5ca4a784bb73d7bcb162d24af61959359b6f82. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:46:15Z), 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/ARA821000482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedfad52db64b2432d7baafa3adc83c66126e36bb7662ccf758bd797c5102c895. 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/ARA821000483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74dc5cc64354c2bc54bd49e5782470ab0675a6876300632d8d5825fcd73c7cb2. 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/ARA821000484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x259a7ad00ae30bf01d20837ffb688cc59d859dd63e5d6204e4ccaaf04ad3178e. Chain 2 (Bitcoin): anchored in block 958653 (2026-07-19T03:54:23Z), 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/ARA821000485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57099c8e412ab63089b0c11add6d3a50432e47b4ca489c9faf28595e00592b3e. 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/ARA821000486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf488b21a4144bdfabf3bac3f967efc72e76eb1bf6938db3fae44682e5faa3df. Chain 2 (Bitcoin): anchored in block 958682 (2026-07-19T06:17:12Z), 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/ARA821000487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbd10120dba1c309b68b500aea8b432d944416d6552a87e9c34907a96dec8112. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T05:33:48Z), 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/ARA821000488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x599440f6f0ce6b531786794585ebce007213905bc4f27ae08c2d4b9f6aceb4ec. 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/ARA821000489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3132bbc10914b1973728e5d44a8c7f9b37d3dcce1eb92986ba8d80faa7737287. 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/ARA821000490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64f3a1f802ff285ae37f09b2656bf24d7860c76dc07746438a00b427601aa680. 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/ARA821000491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36af1d670add9463c006fc0af4178fb3dd055b20237077510fef147e4c3bb2cd. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:48:31Z), 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/ARA821000492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x636dabcccfbe5f3577079bcf9e5664e3c8d9b257923908f3aa5f3d514e2657ee. 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/ARA821000494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68a5e0bae3064fea43cbc1c295efbb9dadc7733840fbebde34ac7c5cdbea4094. Chain 2 (Bitcoin): anchored in block 958130 (2026-07-15T11:16:56Z), 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/ARA821401374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc73b1143c98e12089d77f75ed7f8d8debe408485013a7343d4b51cbaf5edcfd0. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:19:43Z), 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/ARA821401381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31f386b09328b5f2745090dec6a4b0ebd1167afd842c647d3ce27b967bb907cf. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/AR1K22000022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x237609b86211b51e87816d2be17c38eabd9dfc364742ef8ffec5a058d32034c1. 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/USCGH1712212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d45937122640a8a4d0c72832a1b529b7461e4db79ce5bfe2051b84e4583e0e9. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T15:23:08Z), 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/QZH5R2000079.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3682e5a4e7a1b3bf76c26d74d613ced37a1f71e9ad822b1651dece4537fe587c. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QM4TX1892903.