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 0xc4087d17215c09f6d11dbe91cc956327abe56e968fe808c37a5fdc805f853564. Chain 2 (Bitcoin): anchored in block 953618 (2026-06-14T09:16:10Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1db4f94a-4a12-4a87-94c4-34acd7ddc879.json and https://artists.proofprofile.net/proofs/artist/1db4f94a-4a12-4a87-94c4-34acd7ddc879.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 0x1d5696d284a3fe96d8db52453bee84cefd5ed17b07a8f25f288b4282acf2aa18. Chain 2 (Bitcoin): anchored in block 956862 (2026-07-06T02:10:22Z), 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/TWAN71271643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb92a04fb9dae04622176efe495c1eaf2283022b53bdf11be00c07b7727fbebd. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/TWAN71271645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97cdf6e54276e0fd85a094a5d2dff4b1ca1fa272b25ce578e8a63688b44b294b. 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/TWAN71271647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5abb4d48fba6f2865597eb76ba82f459a2bf37849c480f7f75f2adadedbf4373. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:00:01Z), 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/TWAN71271650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbc996416dad1293dadbebea612d91ccafea057670bbf179756bcc6876c57aea. 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/TWAN71271166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd36bffbf021624cf7502f8f5b999b3afca9f566ee69946d690ed40f87804e8f3. 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/TWAN71271167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad50d95e02e2bed858c8cf8c9aac19c87e08fe8fee4365e73bb5297d17226dba. 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/TWAN71271171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24244fad6766c9590289f594d6d0aaf4c2842a6a53cfdf1a968876eb631c9282. 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/TWAN71271172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e85c1758673d52e1a83adba92a78b41989d2c195e618afd0c35d92beb6cabbf. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/TWAN71271179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7faa514a78a4d1b91b27fd15d8c5dc82ab065ac2f9c43f6b360223997b327f3d. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/TWAN71271182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf267ae8f8d317085ee740bb7d424f9d622ac2472a2800997de0af47cde2d925. Chain 2 (Bitcoin): anchored in block 958613 (2026-07-18T21:35:09Z), 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/TWAN71271183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x552ada9f804c1caaaf8bd5b7e3ce6136dca4d8cba876f88058926391ad4fd634. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:54:36Z), 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/TWAN71271185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8227466277f6ffbbccaf9f129fd29b01c6ea082231a28b6f6972457a089ba24a. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/TWAN71271188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7d04b32dc258f777cbeb3648c2526a30342dc300beb64e3b2d3004a8abdc37b. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/TWAN71271189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fd0513507ea42267248cb412f10977da2a98eb2f84d74655bf9623b1fdeb2e3. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/TWAN71271190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83b057ad9f673961dc49ac3a5eadf25dc6f3da71e23e757b03e12fad5552bf67. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/TWAN71271194.