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 0x3075a7bb085f63bf401e418e9e769e157bdca0d125844248c28da4c21c6362a9. 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/983e66f6-82f8-4c46-bb9b-e83f469407af.json and https://artists.proofprofile.net/proofs/artist/983e66f6-82f8-4c46-bb9b-e83f469407af.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 0x48f20ef6c0755efa43436abf92f1d0883019d4e8e0807ecd9477112aeb583723. Chain 2 (Bitcoin): anchored in block 958850 (2026-07-20T08:32:30Z), 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/BRH031600060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x398aba5a823bffa1d5d6660fabd3432def20e39bc4fc56e97a26d4a0296def3c. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/BRH031600062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2b83091abd9c501f0b96ffe46e3113941d663ce3a36cd5c176657f55d22ae35. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T09:11:53Z), 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/BRH031600063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadf0fb3cadab458a60006ccb60c1c79e0802c13d086967ae62a976bdb0fb12ff. Chain 2 (Bitcoin): anchored in block 958903 (2026-07-20T15:22:45Z), 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/BRH031600064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3f6e1aa39a71a438a6e4f734dde310e7512c3ab60011c6a2d2acff5bff20444. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/BRH031600068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde662fd27efabcc2758fa81b86c87f4a75347bf5ebde1409d99f9c1a3c44bf94. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/BRH031600069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93671618e30f8c592532ea94bc7e4f875e976c7a39789915bca0e94fe6e6ee3e. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/USHM91717407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99fe31f3098c3b6fa45dca4cc0d69f2f3a175ffa44990ae4e05c4a831c6b07a1. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T20:03:27Z), 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/USDY41805128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c090e0c9e9cf30940cb2091a94625a70ed1c35c2bf5207c318bcc9e774e0173. 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/USL4R1804956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x969639afa48b18e291610882bb7f0a55ea4e83d7fcc11b98ee82f2a7ff18be0a. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USX9P2018539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bd7f1e61a01bb516dd95462ede5d3d87c715cc19395fa896794cb47909278ad. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/USDY42128161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77796c256763c94e2e954751d11086a4a70d94092707d0451c41dbe5a384acc5. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/USDY42128162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5ccec34691d2c5724744ae6eba571d55ddf078b0fea9683bb1395b5d106e8d0. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USDY42128163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x267e100765b4ef105a580c2ff725d71003820ffdfa25de0a938df866591b3e7b. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/BC3TF2100007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dbae53831f3752532eefdc5e8c35c0c96d4c9fbc1d2abf9611f28a049a5b53f. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/BC3TF2100008.
Um Dia De Cada Vez (feat. Vitória Affonso)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea65cbee31c02d76aca38cf32e437a6c3b594a49cecbb78ff6289a11d2ddd927. 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/BC3TF2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf34d21af55eee6119ddc64b3fa4643067bb2ae9f6c8eddd9ae7113b58a37828d. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/BC3TF2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea65cbee31c02d76aca38cf32e437a6c3b594a49cecbb78ff6289a11d2ddd927. 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/BC3TF2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf34d21af55eee6119ddc64b3fa4643067bb2ae9f6c8eddd9ae7113b58a37828d. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/BC3TF2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8405f7fc7395bc7d705d82bc898c5ab0dadd7a7991a37992c6f303f95a75808. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/BC3TF2400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa69370b225c3e8bc3e9bfe0e7c106cc35c75820045e39b661f55da969f894cf1. 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/BC3TF2500002.