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 0x4414a6d7b0447e23f538f4e6a0895b892a96338d6a98218fac7b6131ef0b35bf. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c97c150e-3fc9-4621-8d26-cc29043fcd2f.json and https://artists.proofprofile.net/proofs/artist/c97c150e-3fc9-4621-8d26-cc29043fcd2f.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 0x4fe65e79012397fc7015cddc6b48871ec08606ba973fbb60519aa9a7fca31fb1. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/QM6DC1516420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d8cf812b88fab7a38ecde3158a6e66e862dd8a3bde78312e4542c3602053e68. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/QM6DC1516424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0be14945852ef63688ef1a33d846d858878ced29f8845ae320130f1a48625dce. 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/QM6DC1516433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2566744d8a7b919c04e4d2f6b36a2cf7b31b7eff1e28da8b3a38387e13152738. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QM6DC1509335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6833b15b664061d36b46912fae4ccd8245099ee7f7a296a8963a535295fda8db. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QM6DC1509336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdea030ad9825b9075da7d72fc54a2d1335179bcbea7ef923e9545661874ef7ef. Chain 2 (Bitcoin): anchored in block 957796 (2026-07-13T03:24:42Z), 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/QM6DC1509337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49a41408cd4d6025db8fca276c261f0bb6820d502601a5153ee84d65d9730991. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/QM6DC1996317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0811c5ebcc6eb1dda160805a5407f987d30260134ea7c59f31a96b1dc7838099. 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/QM6DC1996319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45a92f4d708a2a6744e0957889b6c69a50b23a359100872d54da1b22036bc924. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/QM6DC1996325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa0f5e2ab3186aa4ccb2137396a4e4bfaa07cc530fe816cf2c811ea55f4d5152. 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/QM6DC1996326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2933abb55c0e9acc91f98fc42c031f9745214703eab0c832d2740356384b2405. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/QM6DC1996327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x656de7146190e1a0bc89727ad682cc46467fe358ce0dbe7fd2ae3e642770c367. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QM6DC1996329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad968fb55a176733557239f316413e60f5fad513bf5e09ce7e91fa8f558ed30e. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T21:34:21Z), 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/QM6DC1996335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf033ec33bef34064c000baf0320f497f731666c5596af6e0f52d668b10205ece. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/QM6DC2073822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4308c09c100da0de968aab121319f8abbc6b5e8366d77ce5713846ef67a8b7a. Chain 2 (Bitcoin): anchored in block 958682 (2026-07-19T06:17:12Z), 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/QM6DC2073825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85a3e03803bb6e25801df18b858f0bd53bd691bc37c3c79f37ef39a775fcfe04. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QM6DC2073829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f62d58f101495defd4085d8b8ac70d4e2188c8a5b36c2b6fb2b7ecb0a6f4438. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/QM6DC2073831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd78816e94d70e531b1a51e0e39f0275f4b22f230e070201c5a8b5d17624d4bae. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/QM6DC2073835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51ccc5dc31738f8e9fffd3d871d0a0d7fa26f1164b90bccde92f42d4aefb298f. 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/QM6DC2073805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd395f6a6c002466d33c27a46c970d62c1570d4fe6bd0bb2b8e2c3ae0b61abca6. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QM6DC2073807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe158dcc25b4c9b1f0473091233d28ad97d48c521906196154517d1fe45705a1. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/QM6DC2073811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fedcdc77c2ac707befc93424374d65b80ee4e8ac6b371beeafb4f38c6f91519. 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/QM6DC2073812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55fd0524510f9cb70e1b0b73a0f001b33e3b1f8d6fa2327e78fd30cbc6116558. 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/QM6DC2073813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca5c8fc6c7078d42bd8b8494344a783ab944e34709224f7f8cbfbdbcca51b6ed. Chain 2 (Bitcoin): anchored in block 958474 (2026-07-18T00:59:09Z), 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/QM6DC2073814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d1f4795ce1e219519415f647ee22eda5d044f1ffcf8648a7121a96c52d595b0. Chain 2 (Bitcoin): anchored in block 958514 (2026-07-18T06:54:37Z), 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/QZNFJ2119042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8d26f8fe7aa0a6fdd076504dad9ede12ec818e6488736c01f2680e9bda8ae7b. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZNFJ2119043.
Lo Que Tocan Los DJ's De La Costa Vol. 2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa20670fa4b1d99845b60656f62a3963ce1fe633a363d10056168ef2d9cdb0517. 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/QM6DC1855389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45481ceb53edbb6390c9e2404355f7feef5aebcf5fe168696f6e96a0f84ba76d. 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/QM6DC1861238.