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 0x435c072217d0f6247dac138e22b852a9d58e6f4f94f7759d9c33f5669fe680da. Chain 2 (Bitcoin): anchored in block 953596 (2026-06-14T06:21:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/09af8008-2601-4ce1-9d4e-aab7a4385455.json and https://artists.proofprofile.net/proofs/artist/09af8008-2601-4ce1-9d4e-aab7a4385455.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 0x65114a28f7c7a796cb7a062ffeaae6e1190b165ceb9b72f89dbdec7ac838c937. 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/FR9W10800418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77f480857c20a5d1a7dca0097ad50b83b8bde0091a1a96f3e561f0f476c19469. 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/FR9W10800419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddfc2b8ed38c8ccc732d2600f41133c1c88f0fe8f7b9986f799c82659cfa5b1f. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/FR9W10800420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x054e0c1695974568e2f0a31aaf757fdf4d92e5570af47a2b303561696c61d265. 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/FR9W10800421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1317d4ab3af48df3724a465346d48feaf3be5a0c30d3721b029180142b25f314. 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/FR9W10800422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1dd024e39e417d0d5aa897d8e8e771cdcfc1d7a64e28fd696ae6e7a67613b7c. 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/FR9W10800423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x929ebaf1a186f6caade4bd1f4181974aa73ab6670b83440aec35e98f550fd88d. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/FR9W10800424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79c594f122a933b447b564ea82fb9274c850f0fa1c37e0d0fa9ed5520b661859. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/FR9W10800425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3b63f09b73abc145aa677be7d000468ff5f827adf8b197b4053f024e5dc1c32. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/FR9W10800426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32315504c188e134a93e8b204c8b26db0043fd4e0a34d7f8751622b891cd8a61. 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/FR9W10800427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x496431ce370c01be20525d34254d282827203e269ef69d49b4bdd067a465585f. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/FR9W10800428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2aeaabda7bb5554b6af80cf0a1c1e688801ec7721f660fdf6bdd297209ad25b. 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/FR9W10800429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88113898311a77b34cf97013603c5a4220e71d65a50c1bc7b9b7509c44eac751. 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/FR9W10800430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x577029d10f5b61ebafd844780fc470b130da3ceb273dae137da80e2719c5930e. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/FR9W10800431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x327c732efc3dbf3f67bc84090acdb1d1ef645ec4216aee2f6349e669cbb288d1. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/FR9W10800432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff084e0c43b23d974be15b072ff60474374c0b466c5d89773d0d0070d218b692. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/FR3NN1611001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4829f5fcb4c9cf399d044060a600b8f4a7ba3a9e6a71690d94d167f9de9f36d7. 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/FR3NN1611002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86e97c7d297d6cf97fdb113b1d23d2170a76a9d9389e72d37da3fd8084074327. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/FR3NN1611003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bfa1f1ea06d8baf7a922acd8d0dd261f3b88b9d0c700cb6637364cb11a34d33. 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/FR3NN1611004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11a34cfb7853860afbd1b2b0e4da19577e89bf95fea99149c8e1c86f436b8031. 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/FR3NN1611005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x949ecfd03f1adc11ab6afc92b2f2ae0a1e0d235bf4d8a9764c004791b0f33cf8. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/FR3NN1611006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaacbc6754c317f3aadd1c9d090c8cd8f110bc99abfd4dca2ec445c8fe3adca5a. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/FR3NN1611008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf43cf240371ef9acdfc8e45f2a3cfd75d79bc155616af26875a44b7cedf1264d. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/FR3NN1611009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7bf56f5fd9e189979da080097a3685206b003749f10a1a5dbef317eff0f5e80. 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/FR3NN1611011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99430350e22ff86be8b71b7706d0f5f5a334e22aaf0684887c892ae5241bcd86. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/FR3NN1611012.