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 0x1924cc1cd721f3cff877e5b3e3154c72f02e40723e83cf574526f321da8431b4. 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/fddd3522-6d5f-4e96-b93f-5bff9b4992fd.json and https://artists.proofprofile.net/proofs/artist/fddd3522-6d5f-4e96-b93f-5bff9b4992fd.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 0x3c3a1a8ec4be989178075847022ad1d547eee6ebb5d294b3fa6da0c4552539ec. 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/IL5849302075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7979784178f99861803f483f4bb57b16aaee3668d2e82344f04f7781bd84b740. 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/IL5840601243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb03699f7a1e4d2edf8e644f0c56d4922a1d04394151a9e2619cf3c328d1b511. 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/IL5840601244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9c66bbef15ed59dfda19738a2a501a35f9ed389fdedfd9df7f9387cf7f5bfcb. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/IL5840601246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa154e01a4feefa45f275f75376b306b248b64e0b0e62f4a9f21be58524314e85. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/IL5840601247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1eda4ac160d4fe00ffaa743c1fedf1295b02deb5c04456b8e26c3895ca21536e. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/IL5849802177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2772b19fa93b403b9115bd3231d7780b97a2b829eba06ab4940ef66b91d2b0ab. 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/IL5840002058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a1eace1cb637ee82a3c063bab82d64b170ffde79d851ce9fb1e534715e9a61c. 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/IL5840601253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6130176de520f1956ce1cd6f559b8762606784b3b8f2c35dbdb7510918b91648. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T22:06:02Z), 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/IL5840601242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9c66bbef15ed59dfda19738a2a501a35f9ed389fdedfd9df7f9387cf7f5bfcb. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/IL5840601246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa154e01a4feefa45f275f75376b306b248b64e0b0e62f4a9f21be58524314e85. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/IL5840601247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a7b8eaed701e722ede9bd72f09af0301675dae05836f0c2e02e3516ace46a3b. 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/IL5841511596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb087c1f4b62e7c5390fcfa43c3234fa3c524c09d5e677d5c3158bcd049b8523b. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/IL5841720486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfef8db4015aa5130bd3c5d4739a9102fe7415311f7f5e783b1c1316684eee8c5. 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/IL5842449909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef3e0be43dc60d65cbd3646762679073ae9193ad379750d22aadd70aa3f3166c. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T10:41:35Z), 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/IL5842551763.