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 0xde5ab13c20af9501159ebb3be0e5bcb6882695c063ade9886da029a970c2dfa5. Chain 2 (Bitcoin): anchored in block 953923 (2026-06-16T09:51:37Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1c276e04-2ada-4746-ae2c-91aaf6944b03.json and https://artists.proofprofile.net/proofs/artist/1c276e04-2ada-4746-ae2c-91aaf6944b03.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 0xf3a9490d4bd8bd76d088f944128619356f89e1c7648cf68ce74485718397640d. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/US78S0511208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26e3d3688a44035dcbdbdbe42ea4523a5f8a2f972fa4ddc7dc720acb429b9c1b. 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/US78S0511201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe2413ed33da97e636ffad566fad563d1a331c8129948ec88d63df1ecf9196df. 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/US78S0511206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee400e8cbb0f6581ac0d05fdb3eb8695f661178b32ed0a7a65237f60202662b8. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/US78S0511209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ab3fa4fc61d591f906d2a66513d60632ef9f6d2184f15140ff9fabaeeea1910. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/US78S0511202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa42999cba53eb6d243c99cfed40c80844ea08afaee09d68642007e64d0b24fb8. 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/US78S0511204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cbf95a4fab6428480dc39fdd4069651b00d9277f9e9cb33eb616a61f97fe73e. 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/US78S0511210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe434e95577d77db76a1366c5d987ff71a5a91d8d4675d5b07ddcfe133992b2a2. 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/US78S0511203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7251b69a3c48d0e11ccc8c344c6cd96d1efb28e997f9904a5c33f58d7f7b25d. 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/US78S0511205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x315631ef1e1e479c6562cedf72c04b20ee6eb5de080f42ac66718982725d95c8. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/US78S0511207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ff1c27db59ce19b69342a1f69056773074993cf42ef2ba3cf3f927d97843247. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/US78S0511211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e38f5cf81cb8eccc2d42cdf3a00741891adc90e0a8fd07746127864fd6e5c80. Chain 2 (Bitcoin): anchored in block 960330 (2026-07-31T00:58:21Z), 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/USA370576136.
Tribute to Aerosmith: Not the Same Old Song and Dance
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96f60ee4bb3f6fdff75813409bdbe05ca96c329462c329ed8267f3ce11c80cb5. 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/USA370657402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae64191b5084da5139b4604685e8ee1f68ebc09d93455e519f4ffa8ed7537250. 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/GXAPU2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ae2f1debccfc9fac9752a7ddb0ffb47ee720651d9231cd3dab9a8ff59908796. Chain 2 (Bitcoin): anchored in block 960198 (2026-07-30T02:21:55Z), 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/GXAPU2300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65d9ef15da514211b4d7082e9ab77fb796e44012035602314940a6e5844efb6c. Chain 2 (Bitcoin): anchored in block 960153 (2026-07-29T21:57:12Z), 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/US78S0510607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01fa95475cc53b5123674d7cff7fdc44704c9f20e78219002031e1adff1c7e98. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/US78S0510609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9caf5d44a4f6faca658b4c6e9b564a6c250df44c2c190f5d806f7df170225211. 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/QM7281540162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fc94b8ef778c011816b77eaaa7096ced036a90ad4d5b7498b00dcbf22602974. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/QM7281540163.