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 0x9e160c9847389c205977fa894728f6f89065a6af6f7c0c547d44dccbbdaed304. 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/4319e2c6-035b-407b-adaa-826885855102.json and https://artists.proofprofile.net/proofs/artist/4319e2c6-035b-407b-adaa-826885855102.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 0x65b3f2a28884758d74d98b688d88a4126c4caadf8659aa6461dcec53c6caef8c. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/BR03D2500241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc846e65f8a6e035cdfdf65983ce0c04293221143a989a421439f2b9aecb2d1e. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-16T21:48:38Z), 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/QZ5AB1758539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x233dd832434f3f9d4c0ff2f8ceb61caabc9d26f49e027e2b6d520e08fcd03f65. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/QZ5AB1758541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75105d244451828c6e141248e4a3cf2eca2ab6001b12fb828ce89ee22f72431b. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZ5AB1758542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x079acd62f47b7e4d989e6f6e665ee42783332a7bb126691ed7cbe68db03cd0da. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZ5AB1857059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ec6a1d42ea5d573c90254357d809f68a21a1a3c3655b8c547dd831ced34d0ab. Chain 2 (Bitcoin): anchored in block 958666 (2026-07-19T05:00:30Z), 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/QZ5AB1857063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8198c969677b6f7e53980296c021379e7b346097a880765215b31f4564dae880. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/QZ5AB1857071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18d727980766367a4145b74284f8adbbba8c2f15f322b071e0c2968f78602cfa. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/BR03D2500223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d289dc8ea899da864e2abf4bea54c75dcfd87642e1f5a1c1cff35dcfd49f712. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/BR03D2500237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7ffae30606cf7bb0cbd20af4ee4c097c77246fcf4de38389c296a6511afce6b. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/BCT0Q2200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd92f4c6ee8e32baf602854831d1bac407c2dfd4b7a157adb1d1ad5758707cd3b. 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/BCT0Q2300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33bb2834a54e45067a68b74b9d77424e2b03cfdee6037721ed66b47cf7829f70. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/BCT0Q2300008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33bb2834a54e45067a68b74b9d77424e2b03cfdee6037721ed66b47cf7829f70. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/BCT0Q2300008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2f98dda6f18268854491a1d0370a2d5e916ca8d1dd6530e4bfdadadc5cb8e7c. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/BCT0Q2400011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14033f93c7e07c65ae28fd53688c766c0cb5b81b0fe19b4345868400ef41deee. 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/BCT0Q2400012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04c857710410a7986450c945ebcb2cd836af2d99e3d2b6eebaed4f4e7b1335c4. 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/BCPRM2300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x943cec6e364e2afb8129f63c59b4fd976862697733cd53ae148e5444159cc35c. 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/BRKPA0400179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71024b4fabf23100c9a8b16b7d3ded37eb16278d21cfba08dc867a50e59241fc. 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/BRKPA0300067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff3370c4da4f7b0587b27a99c86d4ad20b5b37afd429103941ef8bfd10bc3b7f. 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/BCT0Q2300014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39094af8cba756ec4ed6c00033f1f7a8cbe42fd2b07da761b6d37224fdcd0aa9. 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/QZ5AB2314641.
Circuito Reggae, Vol. 9 (Ao Vivo na Portuguesa)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x883f0ba1eb8f8f796a912438e559a2bc23a4e0447eb520b54f81c38d3aff13fe. 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/QZHZ32071392.