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 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 0x2dbffd567dc4cf24a759c3bc48de29833b26ac931e73a343b5bfab6b7d30581b. Chain 2 (Bitcoin): anchored in block 953713 (2026-06-15T00:33:41Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/84425fc3-37ef-44d2-863f-1911a0f9ccd2.json and https://artists.proofprofile.net/proofs/artist/84425fc3-37ef-44d2-863f-1911a0f9ccd2.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 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 0x5fe28f3ff4daf192e62d25fa317be04496b809d032a15f0652fc982670282d54. 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/BXNIB1900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc100c874e7d3bca096c72f8c662059f929b4cea1b34ca1fbe603c06fea16e8b. 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/BXNIB1900002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60783d7169313f3702cb152f1a6320422611bef8a7edff81e8453a91cb594626. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/BXNIB1900003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd1a7759c1c2f7a3e6e11f0898a25310db2fa50bd8d75f737a09379d8c578af6. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T13:34:27Z), 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/BXNIB1900005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8364ba8681df6832369ee3acb349083a046544e45209c0c1d3775f1a470bb5a. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/BXNIB1900006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66d2ecdbdcc14f9d5ab7abc942fea3b36e2aacb511fb86f799f40bb7c0fe8c59. 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/BXNIB1900007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x818348dd324c7e17187c78bc316bda685e29909557ab0625415b6a3d23a024c5. 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/BXNIB1900008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebe90560b4a452de83cc2a2f516d60beaebd982d81988b93b2f2768841939216. 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/BXNIB1900009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9a95682adfb5f633ed85b143b78d543a0bea75ba757c0f2e68ce2d7890f1ff2. Chain 2 (Bitcoin): anchored in block 960157 (2026-07-29T22:12:10Z), 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/BXNIB1900010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61bc20b8fbd837d06d00921affbff686f851077d2da6ce91f53e39cf166a35cf. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/BXNIB1900011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a4e1d5f2dfc72e527db714f4afc8a90fdc8fb055431d22824dab4238bfc4f37. Chain 2 (Bitcoin): anchored in block 960113 (2026-07-29T13:38:16Z), 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/BXNIB1900012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6a2c67bc2d30b27f5a319032153a30aab77c9722e5db336eaf7e28838136eb3. 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/BXNIB1900013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01f77c787a4d97e688fbea43136dc151eabaab4a6d5f2835cf0cb1dc1f29d74d. 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/BXNIB1900014.
50 Anos de Música – Ao Vivo Na Sala Minas Gerais
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e28df5e104fe3476c382ff6e278164288efe3c10734564db25eb80d7640ee48. 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/BRLBM2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee11a78587f32cdb1ec2ba88814774060ce853d31fd17ba041c2d3784c040355. 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/BRLBM2300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc026ca583c893074c162b7d8d7c21c4a8737f954f6321aa76379c625f41a39c0. 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/BRLBM2300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63f5a0dc91aa0bf5d3a6639958f32c76ece0b366c8b8013354bc5029b55085b9. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/BRLBM2300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21a14af83dee7dabae62a3dd25c9130f20606bad4873f9ade9274e600243ff0c. 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/BRLBM2300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd0adbb8efd4a44640230aa9ca95b5ae29fae8b6877e2b1846527befa846027b. 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/BRLBM2300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a60133adca6e8ec6f6b06f0d470bb9f49eac19f5d35d8f58ad9b57e3d68f8d5. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/BRLBM2300007.