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 0xc03111870fb60ae7265f3d2f40756bd3075463d1033c51d5629fa381f3fd39d3. Chain 2 (Bitcoin): anchored in block 953765 (2026-06-15T08:55:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/badc7e41-6c20-40be-8e61-2f58d2c4648b.json and https://artists.proofprofile.net/proofs/artist/badc7e41-6c20-40be-8e61-2f58d2c4648b.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 0xf93afc216b78a304b109eb6beccefe24505595c66838e19a934cf53d87dfb6e0. Chain 2 (Bitcoin): anchored in block 957057 (2026-07-07T15:21:38Z), 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/CAGLX1800001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d98e3c827faab89aa748f2d8e2f9dd556f0119cedcce98bcbe83d43dbadd53c. 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/CAGLX1800002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe38e39e4d510bcb66e855587906fec47bb70ed52f239896efbfa0ff6e13c6a3e. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/CAGLX1800003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe127d676740d23337b1b639e0badd58ec2bb992a11fbae0afd091c876489644a. 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/CAGLX1800004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98e1793aefd17080052a30ebe5c90faeefc55283f8f87768133c068c276eafb2. 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/CAGLX1800005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0acbba63207534903b8d7f5146177ad75ee6df0e9bd04fbdc33ae3305af872e9. 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/CAGLX1800006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x854dccbcc6dfc0a5712ae68927b3053eb056f4a7881b92d9001ba8299a0ff175. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/CAGLX1800007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dc7bce3d27e3ad3361d3929e1c1039814cdb085a97c186fe5ae226e2c30a9a2. 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/CAGLX1800008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf90278f820976480b7a6990aae22935cf2eb2608e67deb3d7024d143872793fd. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/QZHN82493526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0239b5ff07b2081a8bce26ed8f6e93bc2458dd824e7e7385139ecf7114576b6d. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/CAGLX2200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfea8121053277b356cae518c8ace16b981ba994dceb8ff83269789bdf10fb43b. 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/CAGLX2200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5900eaa2b04ee56f13e7a68be2a9a7da65a3ab13e95166b2f8f030e9d07adff. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/CAGLX2200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5900eaa2b04ee56f13e7a68be2a9a7da65a3ab13e95166b2f8f030e9d07adff. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/CAGLX2200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb94761b21e29def24d01d733d267f2239a94410bb3c10f074b9696ad250651ce. 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/CAGLX2000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4112c512e86129277fa838eb6ad483348de620ab3178a4621d4a02396e034b0. 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/CAGLX2000002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b15d9ef6c959424dfa3bab459e2b45d6b1b10a79c2fc74c38b938a48a2af75c. 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/CAGLX2000003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x021895e86fa896d43528ed1d2d959f23c2fb5ad2a16fd6dab28cbe559cec8397. 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/CAGLX2000004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x820a49cf917f2b22c6c1a12501bd95b059698cf26dfee5eaf3a909a2594e231b. 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/USL4Q1941743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x834520cfae80af868401ef5914d661a7f59b138afe30b858e29b3eda83ae3816. 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/GBSMU2794129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea944ef951f4a737371c2be5059bcddf5a74e4cf71b94c426518b3cce0349422. 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/GBSMU2734117.
Ei Raat Tomar Amar (feat. Ishmamul Farhad)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5129eebedfa9aa1ccc84868234284d8b604ae894489dd903ae8fe8840a4aff03. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/GBSMU2716553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff841ab603ff4d598b9bc6eea77e994de262e11d58de9b538c598b2587932c7d. 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/GBSMU2687367.