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 0x47e845c08cff261e852049ed5a29333a96499a606d8e653d456046ad26bba671. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7a9ac701-55ce-4241-953d-ca12eaf51437.json and https://artists.proofprofile.net/proofs/artist/7a9ac701-55ce-4241-953d-ca12eaf51437.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 0x5500b249a211ebd6cb45a3b2dffbd27d099fdc63a5d50253f1cdfedacefc384c. Chain 2 (Bitcoin): anchored in block 958041 (2026-07-14T18:13:17Z), 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/QZ5AB2349521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5674f9a503f24b313f335f381f75d56211d03292f744b499d15919ee8e9a6c57. 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/QZW9N2250054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73b42d1a3708aabdcd4e79302108d2013bcc7594774baaaa758d2487fb01598a. 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/QZW9M2263577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a340f5ba3ea2e1fe0fff7ebd44fb09cd37ecca2b50d46d95f83256abcadbcc0. 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/BC6UH2400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99dab3852f965f953a02dd58dd4b8ba24600f894425824cea37396bc69943ed9. 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/BC6UH2400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc01b594ffbd1b97c7fbacdaaf3471b746dc5d3ff8f8f802b8cc5480be69802e5. 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/BC6UH2400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69609490555c249b8faddf6d44dc7c827fe5b97f9739d8795f17983bd625d87b. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/BC6UH2400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdffbbc889c6d3db841984f030eedb1bfb28af7c1c9556c30d70d0ae4f30d7fb7. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/BC6UH2300008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0b15d212ebf22d95ab2d7640788d6305428a0cc0e579fe4f284f412d3fcfe38. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/BC6UH2300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc76cf6ea93286b1d5c82e7dfc604e0875ed49fde5065810f35aef3cf077285e5. 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/BC6UH2200010.
Os Mesmos Sonhos Falamemo Session, Vol. 3
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a118006871ee7af416537d8230529d99f7fc8b128613cc4c07490df0dbcc06b. 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/QZW9L2356763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65755fdc61eb128ce8100ab0e3ac06893aee1e552d1a2e9b36328999c0b24bbb. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/BC6UH2300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8db0210bd559c0a940026a32b6450123b43468665fef021dad29e1e273402ed3. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/BR5HE2300012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0332e81f6f3fa2b298796d4f055349c19221d9ab1d2fd591a4e2b2a02f28e8f0. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/BC6UH2300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b24aaf62322faabe363abb6126a84be25633e3d64e4e4520111922fbcf8acb4. 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/QZW9M2212803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81265c81cf869bc323d9d0de93c447e79b3e41abbc2b58290dc7764cc8f6df9f. 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/BC6UH2200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e1779c6253715c1cfb9f3fd2ea815c0a21049bfa92c935b050f5031cdb6a01f. 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/QZHZ32212839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4835ef3f1daa82f7bed4e8b931efd9720b945d55a79383eae10228d8dbf6b406. 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/BC6UH2400016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31d5c438536da278557840dbc176815325312fa5fee854fc60b6f52e3357edb2. 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/BC6UH2400013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ddffd1d0481750d4bb621273cb7b2058314294789638a6e363b46530a434fb0. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/BC6UH2200008.