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 0x7a1ecb2466c30a7bc33a14eb124d8285656d878c2bf89e0461437baae6f53e42. Chain 2 (Bitcoin): anchored in block 953654 (2026-06-14T16:26:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/49a714c1-74e8-4543-8254-5cf5bc7a20d3.json and https://artists.proofprofile.net/proofs/artist/49a714c1-74e8-4543-8254-5cf5bc7a20d3.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Die 3 jungen Tenöre/Vergiß' die Liebe nicht
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 0x84523e6665a35219903d92c47de9abb355f878bcfc1ec99f76f91ef2a3c4c594. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T01:01:37Z), 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/DEE869801445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf06fe857c7d02d90fdb0428f02bf2e0a9c03af71b9451a15a54155da45251990. Chain 2 (Bitcoin): anchored in block 958696 (2026-07-19T07:45:31Z), 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/DEE869900974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ead6f65d21fd04c93ab82e6e81294159a1e6e05b7cee25daa65243d84fc52e1. 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/DEE869801447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x560f6c3a87a56eed7cc5dfb0b004854f21e717610182ca02aafff21613a91768. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/DEE869801452.
Die 3 Jungen Tenöre / Vergiß die Liebe nicht
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fe327a2480ee5f1713d5a3a9c6f336877880216be97110ff6b42ad003fefa7b. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/DEUM70605290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9142d436fbe198cf370b2da422478a7f5444ccbeba4e93237b743dc84d38eddf. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/DEUM70808083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeab1e5ad94f80ed30f6771ed5eaf7b84e1d09727c3e8eb998539bb1cd608e884. 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/DEUM70805430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f1820b1899b065f143d0f600cd6aa4da2ce36599fcb79b850915f1e5b136cd1. 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/DEUM70805433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4e1a03d6f297fe0691e72c9c390dbafba10b58a0ad8bf3ce09fcaff8c3200b4. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DEUM70805439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f5894e3f0a8e8107ab84880141e3d05e9811d38e57256e507bc56c50232b7b9. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/DEUM70805440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf423f1f533d7c45a5a88929d8b231bc7014ef6bb3cc84cf439084fee79f8514f. 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/DEUM70805450.