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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b5f61ef8392ba3ec8fd95382872780b143ef7b40bb40e8d397dcfedb3aa769f. Chain 2 (Bitcoin): anchored in block 953636 (2026-06-14T13:03:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/360fcd38-be56-4e99-a339-21c2a69dc063.json and https://artists.proofprofile.net/proofs/artist/360fcd38-be56-4e99-a339-21c2a69dc063.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e1762244075a6bc8b82c2aa6137fb66150e8d480fa11198106f06379571fde7. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/BXDME2200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf090e1697711fb8fe048708af9758b92334b20b4efbc806f28f84ab3b48bfda. 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/BR7IP2100193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ccb95d5c65add8c7229b0b3ae8e37261bafe4e087fc463652de23a13f875146. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/BR7IP2100194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x292a1765ede01896bb4095cd7ffee6ca70fe58e13e39287230cbf4818f158c9a. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/BR7IP2100195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55e3c2b6337d1dfa733e65b041d5ac6543b4f480efcdbfe03c549de8aef8dca6. 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/BR7IP2100190.
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 0xfff77e5050b3eb2950a9b7272cb03b8f057909629091f2fd58d7fc2a31c15cac. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/BR7IP2100198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61b76060b64f26b44273b1607cb09dc4bbcda44179171e5b4c533a8f0949745a. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DEB331801801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20eddcf7c60727ad3ab7c371c112f173213756d47ed230599b94f092bcee9869. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/DEB331801806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaac45b1024705d0d13cfc79bd2179a02a4f9eb7043864fe6797c367c44b96dd9. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/BRL0P1000066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13b2ba06a9b1eee4d5d64de1739a92c6fba7595d305ad35f7271ee593a8d818a. 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/BRL0P1000071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf48b027a2c8b8791fd20371070b277e38f7a6c8ccbf1338d721004ae9c7bb246. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/BRL0P1000073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17f543014f6811d5078f35429f604406c52cfbb748f051f087ca7415d69a0175. 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/BRL0P1000077.
Sonic Universes for Guitar and Tape (Universos Sonoros para Violão e Tape)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1814ce23a32e5632568ff0a693f3e144e4e3abbd3bfecd5aad3b2628cd918130. 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/BXDME2100002.
Aylton Escobar - Música Brasileira Contemporânea
An American in Paraíso (Música de Camera de Jack Fortner)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x126c45dcb88d8da770ec4d922ad3ec98ec226ea320ba80906a934b19534515e3. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/BR4632500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7a50c061f4b1ed94b7ebe6de64edf2caebdcb6bbd07c2cf87f87240d0a15a4c. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/BR4632500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe38e77c487fff4aa718326f113ede319ec9d42234d26c7499a9747f86094deb3. 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/BR4632500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d88ab11150532d0548e9569b860350cf230e7d41b23f4cd06ef290087e38498. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/BR4632500009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc6a8caa9323e1014a92fb78014bf3b833986760298ef57b276f36df9a954f34. 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/BR4632500010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7de1605412024a3a1b198c82f16372db926c45f404ae0aec7c1ad4201e883a27. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T17:43:49Z), 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/BR4632500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd49737768e45ae438126c76c8e9290e7d49e3da65f0282dc4cd05a16ad167e8c. 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/BR4632500005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x210ae4d327dc3416d736b3891a84e94e5c903a8fcdad59b546defa7c787661ec. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/BR4632500006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f9e646cb427a5e5b29149751e5ff1623ecf285a637c24ef6a432e768873e03a. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/BR4632500007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0b1453c919318f98fcb3ac60832c910468965a9c9de935a071de1ecae7bc3d9. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/BR4632500008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73e9034f717191b5836076a30ebc033a4852b4e30928ba26b816b939a36db463. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/BR4632500011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc13fdf43fb2bdba3e3a399f3056de156212f940a94bebba9b3b18124f50f42fd. Chain 2 (Bitcoin): anchored in block 960173 (2026-07-30T00:11:40Z), 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/BR4632500012.