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 0x3adb710026e2cc1720dccaffc34fe2c7902aabb90e5c0e8f6370e0515298fe11. 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/d6f29721-6f9c-43ac-86c4-9e358a7de2c7.json and https://artists.proofprofile.net/proofs/artist/d6f29721-6f9c-43ac-86c4-9e358a7de2c7.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 0x2c7fe6442a3432398c6b63437a9e2a7d8a031e1419383b532edfa8589d4a1d88. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/BRAPI0301272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe80c2f46aa2a5f55ae91d188768dd8bf97df886d8da5786f8345f15f961b90c4. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/BRAPI0301281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c7705355cb2abbccddc4ce404b98fbfc11e72b07a0b7b510ad7001662f83e63. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/BRAPI0301279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d5831dba477e8cd76c61d0a930ae98873af95a82ff4542deee3fbceb3fed517. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T10:57:35Z), 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/BRAPI0301274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6d822d3c33234cd20e4b42f13d900387bb862d0680506f087ddd2b217940cea. Chain 2 (Bitcoin): anchored in block 958720 (2026-07-19T10:53:46Z), 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/BRAPI0301277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3668e7a8af3b58227a6dc11370482c4a768436557b363ddb1be2ccdaf5ab000e. Chain 2 (Bitcoin): anchored in block 959073 (2026-07-21T23:25:37Z), 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/BRAPI0301283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26ce21b26f094184908d8313f529732b992b09a4728b4dfdb76860384085be5b. 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/BRAPI0701501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86cb16dc78bd3b6b9e590c2cbb3fa972ecdda1175b34257d74602ebde419fb88. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/BRAPI0701512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb19ac795d78c81d60af95db434b3e8eb6ed82cda11d072a824f3e5bb87c7a6a9. 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/BRAPI1400257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x614001e0589b31aea6709d0d0275f80a555faf466fac3be0a01fafcd5bba7607. Chain 2 (Bitcoin): anchored in block 958571 (2026-07-18T15:39:25Z), 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/BRAPI1900238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9687139990e190f587cbda2f5342f9cbf5fe630f202214cd401e574ffd5f1f3. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/BRAPI1900239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2f164727a53c9c329ee001bb075c7ca23608c190e9c9405404bde72002f78bf. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/BRAPI1900244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8788d428984867f1db8ee3b766b583d7bdb49403df1e86fbd30dcb09160f0de. 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/BRAPI2000049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7c80cb74462a10f96dbf4d4cd02375ff81d9f0854064a98b47c0813e49c4f21. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T15:31:18Z), 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/BCP2X2400362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc079546013d0ced15593df037b43648b479042d432c52fb7735d0a913211efa4. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/BCP2X2500022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x085517a3b15b03a3af891cb3623d8cac592f3db7cc67708cf122a188435332d4. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/BCP2X2500089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb006868b4c68ef0771b20a16d97c1de915c64e539dc9ff2ac8183df6265f016a. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/BCP2X2500147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x965eced8bc8824dfc1c62b6cecf11df8fd10c141c007378a1cd25cbf9e37ba79. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/BCP2X2500149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37d699f12f86ae901eb91cf93290a6f5d46ff8acb376548c2e676ba13921cda6. Chain 2 (Bitcoin): anchored in block 960259 (2026-07-30T12:51:24Z), 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/BR6211400329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbefe1441613f30fd5013a82d309349ec25bdd123ca09b02ce84d0fa559d614a. 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/BRAPI0301268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb977066d54bd2317381d7a35810525606bc65fd104a52721d70d6764ab302620. 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/BRAPI0501142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbee118f3d1d6f2bfdd1511db329df82109654dc4a29cbbba5eb67c49675ab641. 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/BRAPI0601561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93816e36f78dbb7d017b3e2d562c4d9d100e97d3bdc2bf624f85b84f0e0ab533. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/BRAPI0502058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8776b9ed0b5bbfb6a479cc9da6fa3e38a70c375fc2f759a172ac32aa2fe8fb6. 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/BRGDT1600056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44106e2dd0ac9e8b1a52cce93aa04ef2047318e2adfcb39295c370129163f67f. 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/BKTHD2200015.
Viola de Ouro - 2º Racha de Viola Vol. 02
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x210a0a5a3499de8626cb8a5897db52897666674c661426c3c9acceb4896f9441. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/BRGDT1500042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ff19d7d61c4d7abe7e306f2bb598a487fabd8fd665d2ca6ec0ffccaa5007448. 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/BRAPI0100213.