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 0xc1c4e2a75852c3c4229c8b4c4b0db2187414e1c64b1732dcc8501c39a79c874c. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d5a7a5fe-b214-4c5a-9274-51b4588e8ad8.json and https://artists.proofprofile.net/proofs/artist/d5a7a5fe-b214-4c5a-9274-51b4588e8ad8.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Dandô: Circuito de Música Dércio Marques
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 0xd384dd4234d9f81df7a725d9d56c79d6d580a1e6ddbaf40fd62d33d0de2ce0d4. 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/ES71G2203805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x386a462f6f25bbe08503252c5ed5062c34e7a7a799a10dca3e879efeff7e78d4. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/ES71G2203806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf57964e86b40615eec21deb4c64b11e64dd0d1808cabe40128e618ae54dae4e. 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/ES71G2203807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x102f75b52802a40818cb01252228c605a1722e4411711a2ff7c58dbb8513887f. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/ES71G2203808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe032397cfb53dcf11cb5e80928f83d064ffdfb522e24d2e7d488f9d00c755fce. 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/ES71G2203810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x758c530be8aac8a07c0839b41693cb076dfc60a6c1c97e4dbef0f19a545973a4. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/ES71G2203813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4884dbcfa16cf7183f3623dfb2de5842213668bd95cbe119619a0b9f86215a86. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/ES71G2203816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd147bdd484de92c97f46cbce16dce40d57871cef9470e5c50086e8f2a6bf7e51. 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/CLHZ21700240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58fbf0ea30dd2e6eb8ea6a8fef88da36d5c3becafdd0a8f1ddab5e1e67449bb7. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/CLHZ21700241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60a6b8e417ca60a9b89410cd2058a5ddb8c7ad8856349ad4f5178e2cc1ae5488. 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/CLHZ21700243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf64b2bbb75240490ccbf1faf1ad5406277169b235d311a8c0b629959108ddc2. 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/CLHZ21700244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91fc49f090979e5d1f1bafcb6bc02eeca089c7f3d71b1785d87726b4314d2818. 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/CLHZ21700245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf791c8e44716fd6dbab6b215b2d3d74724111d0a4da45186b03c749f90fc356b. 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/CLHZ21700246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06e4e4ad06354d20d234e43a2bde316a46a258520c5c769394cf325dcdbef5bb. 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/CLHZ21700247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfc53d4649c3b9fd94cf16f82b0b33ae14d05b6904a37ac2a327604bdcd84cdd. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/CLHZ21700250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddd370d019bc35da80ce886564829c83091a41c54b7a0a1f12a2f1a8ebf006b6. 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/MX3141100036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x911cbe5c0cb154c9641c62be9796236e659a155570324c68073e40801af9ed71. 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/MX3141100037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20865e6812c34c018305484475a4a865769240ebb73af1d364e23c475b4d97b9. 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/MX3141100038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb30027b053a94adc9d8d5fb878b777182e5afb5f7e75e7b1ffc153bf959f5fd. 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/MX3141100039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa882d29480000b0e99d2058e79917f4d5d779e827369aec83ab668ee826430f2. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/MX3141100042.
Voces Con Sentido & Sin Fronteras (Live)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94c78a2e7bab388511a58f1ca533bd33c0583b26a4b3f157d4a58a447b5451d9. 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/PEMG99625004.
Juan Boliche / Pedro Nadie / Llegando, Llegaste - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e5174aba68e2e18b2066ede3c9b9dd812fd46995c9fdf9689a49aaa3d653eab. 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/PEMG99625005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8483879a15e6779db5872aeb8777411e3c887de9a8e2dac1b3b841142a20443d. 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/PEMG99625006.
Amigos Tengo por Cientos (Remasterizado)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad4f98d721dff8fa37353f6e92191d03538e1d7e5f0b1658c50f79bcd1987f16. 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/ES71G1830750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x542c3b3556ccf93053fd5996c3c131aefed5916d1f0a966ee06b736a6cf6b9f1. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/MXF172023321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad48f8ee93f57f180bd9cfd092b5bdedb8b9ed2169d00d530b5c0ca88f1a3783. 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/BXTS72100025.