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 0x46a320a46e8fe878646b8b78c537ac5728c732fec72213921b277dda6c889a94. 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/5657cca7-b86f-4219-956f-4e3a81ba5f5e.json and https://artists.proofprofile.net/proofs/artist/5657cca7-b86f-4219-956f-4e3a81ba5f5e.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 0x1524674dfd26ab7c512c0f2d21f3e15b4aa3d0494b06e09797b34f39a6c0f837. 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/QZZ8A2328019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2e4437bd37d986b973f05ac5c8003ad1c9898a366ceb133029f8f357fea38de. 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/QZZ8A2328020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26d73f89b2d76b6188caec7306cf11dc0678e19a2743a2390ec796a25e0bda0f. 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/QZZ8A2328021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xded1ca940e9067e6cb7f2f920d2a27d93b8e7655dc0b2b487fd39a93a6b371a7. Chain 2 (Bitcoin): anchored in block 960435 (2026-07-31T16:33:26Z), 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/QZZ8A2328025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbac8ada1439e5cc70cae7e2d62ab76934dd7b5375797670a8f6d25503e79373c. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/QZ5FN2304324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a913899576fd57ff3fcd0ae5e22a339191e1c7912ceb9e8a1250a8bd2f65566. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/QZ5FN2304385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc86db93805da685167e962db21260432ef06a789578d27b7c06ee450e8b26ec. 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/DGA082313449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9f0bc66d1942c278301a9e92e296d0c7206f43cb699a408dc4014104a22f824. 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/USLZJ2366416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ae2d0d9f23cc72e645a5fae2ad6ea40e44a0d9c34bfe0540ccbcc946890eb3f. 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/USLZJ2366418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5541a6c88a801fba24df0d9c16f1d8684ec1bc00b1d2d3f5dac38a137197f146. 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/USLZJ2366419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a12c4f4717e334b5fb061b1eb7d8cd8ca9d9604df760161de36826a22353746. 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/USLZJ2366420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4813e510ae3af7c1e24a0522923001ec039b8b3f60f3cb18ac93280667d869ef. 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/USLZJ2366421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa90d431badd6dd43855ee5307b0441ecc26fe95c63ecd80282d0f5a1658160e0. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/QZ5FN2376366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe694cacd2cf919f6a2fc52d9a3cdbf1952cf94ce06df65bfa10f0561869ac436. 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/QZ5FN2376412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04028d1824520aa1eac21a5a9a87fa751e8ca63c901f7c3c5741c21b5cfe3fca. 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/QZ5FN2376423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06bcb0dda21e889037da445f50b58dc82fa1a46ab7e78cde9a9a84eee5e4130e. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/QZWDD2287212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81e3b7fdf82ff8ad1415a92cd7603f783d7df5570ba29b3a9674fef7aac4b557. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/QZTRX2223859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb052636091efec99e6e3614c9d0d8dbfa8272df45a2001aaae1c76ff5e5c673e. 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/GBWUL2293680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5d9166e071a6bbafe269af60dcdeb14d4870fbef2ab105f6d7d185f64a0a553. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/GBWUL2283104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf54915fc214003e10ddf6c58acbc14cc19c05ca566befe46f726a69b09f158a. 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/GBWUL2283108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06bf0ae4728a01be61dfebf3e9232836ca7b2940d800285d8f5a9131af38b2aa. 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/GBWUL2281938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf57382570e53c79eeae99cb6f3656e96ed5c9b7bad544d2871e3484410acd4a5. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/GBWUL2281941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78c4cff97e20ac38572ccca830367c3607b75a170770dfc2ed62373a5adf92e0. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BRB581100114.
I Still Haven't Found What I'm Looking For - Bossa Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d94e54867eb7491787dc71979f83f5e2ce6f1af443b05f8616be80fccf9a4e2. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/BRB581000403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf9b8adab0fda4c3686dbcb755d9d2a4c1ed970948b52a71baf653bd6d7bc37c. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BRB581100019.
Cafe Bossa Brazil Vol. 2: Bossa Nova Lounge Compilation
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ae36534e6cd00a49d8517dcc461b07d58525cc4848a37db64a2bc03763320ec. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USA371648438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c64a8bccbb6518474b942015e629ff1b5655fe7c49e176c3f33ae81d3443807. 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/BRB581100007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23c0b1fae5c043e4b0044b58537bd43b34eab04f975ae70d9a129c9ce629a45f. 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/BRB581000384.
Sweet (La La La Love Song) - Bossa Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a9f7202e61f568588a711d9249537bb3540dca661b4796c31bfc6843fbcba3d. 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/BRB581000386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc78e4391a8c63b7f05962bc6ad5c29a963300fa0eaad99c667ff3aa215e78228. Chain 2 (Bitcoin): anchored in block 960200 (2026-07-30T02:37:10Z), 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/BRB581000391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81a4f1b919f2d2147d94da5b5cbf6874127401c7cf0965c9816507af48d80aa0. 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/BRB581000398.
Have You Ever Seen the Rain - Bossa Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b8f5d12d6195b72a3a211fb68856f5037003633e149cd981b99abaa495d19b0. 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/BRB581200049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cbf352a45af822169e1087039264a5ff84d06f39bf1531a8fb1a4558539009b. 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/BRB581100093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cd6d06acfb1e50e2d47cc056a45808bf71bdb6f4c112d2848da9c44a4573453. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/BRB581000390.