RAK or rak may refer to: Places Rak (river), in Slovenia Rak, Kuyavian-Pomeranian Voivodeship, a village in north-central Poland Rak Rural District, in Kohgiluyeh and Boyer-Ahmad Province, Iran Rak,
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 0x1b4724689f5a56f7dbf4ac0ee7a982f99f07dbcf532d65596a36e84393dfa641. 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/486a6a00-ab7e-4c37-9dc0-5818e587a242.json and https://artists.proofprofile.net/proofs/artist/486a6a00-ab7e-4c37-9dc0-5818e587a242.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 0xd7d4502f21c5668d6d0ce7977c9e76b54c8e104362f031303bd4458f61c3a22e. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/TCADP1852381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06cf7f69d93b9787395957c58ab0e76b201bce13048132fa23b3d0ac53e8be97. 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/TCADP1852392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd685147226b197c413fd360f4addbd4a06b38c2ad461cf0f1bc8f3b76772fc19. 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/TCADP1852397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54c96e257492fd8c76a397da057c07015c830713d1558247ebe393738d3704dd. 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/TCADR1848654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dafdcf47f084046c14808dd26ef7ba995b3eaed5deef52036f5d305fff79409. 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/TCAFC2077523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ed739e1ca83a50b50080228b27edd5ca64021b98c1be2d315c2d004d0b55fb9. 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/ITHDG2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ed47860b6a3cc0838bf5bfa4a74f7041e2c950fde37a9f69dfd3a24221de7bd. 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/ITHDG2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2df0ab4e61f56181373e48c95f55db64d806c450f72f54d5f236553f76bb87b. 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/ITHDG2400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4de310349da3fb0115e3209dee0ae67c1078491f36e3377afd102c042d70addd. 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/ITHDG2400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc4be70815ee146e02357c01800af2a673ed843f5785880c69b06a7cff335f85. 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/ITHDG2400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f96b2863a98cf103bfdcc45507e54f713bff8179cccae97ae1d1bd75c640265. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/ITHDG2400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d0ae8f70389479f661f96eb79270960fe6f484f8a469c737fd6e692d64d43a7. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/ITHDG2400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfc5ab5ea1ea4b251fefa63c54fccd554a58906d82c4e74ef6dba78df80fa932. 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/ITHDG2400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26cdd3b613c75560094ef98d5838356a4509444034dc97c1c56328de5f6c2074. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/ITHDG2400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4525eff949d1deb21e90ae3a7f1b812f44bb7329b66a07230178f6917a6bc604. 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/ITHDG2400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1afaeef8e16dc683f9f81b9eed2daaea45c6ed31e08d375c14fcc9c32c27f45e. 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/ITHDG2400011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcca368603e7313027c9706f7d7fc6ee79d6507f536d1bc3564a48e9c668ecb0f. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/ITHDG2400012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cc9808ea39174172c864412b33b5bb07ec0e8805244ce5a9cad2fd1062f89ed. 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/ITHDG2400013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae23dc2dd63e2d5d7395c513d29ece35a5c0b541a9a295bc2ef45c34107b98e7. Chain 2 (Bitcoin): anchored in block 958703 (2026-07-19T08:36:12Z), 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/ITHDG2400014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59be2d4443dae99188589199f4a98952c5275b9ba23afb0040de60a8639f41b7. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), 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/ITB552116510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe566962b6b16e1c5d0a90b0a55953d0d8e7a934bc1bffdd89df0bdc327e29a44. 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/ITDF61817044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa64b65715b541981ba996ceed54682567f6a12acfa02037cfffb288a6c5ff4bd. 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/ITRSE1600696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa1c0c090ae4006ba50ec59beada6bc6f0e73741029b7c1d1319fe0985ab3aa7. 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/ITOGB2400077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x247f66b24449b87fb182f4d4339ad4378501492eba4b607dad665dbb0d08ce97. 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/ITB551614090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1b565ede495b02fd58c408eb1f1f094e153e52c0854af2e04455298a8d42c59. 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/TCAHB2351277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63443be47d35f9ad744f9671d3b42be17f7baaab423d4357775793ba2a19d111. 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/TCAHB2351328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cb539d1efe47539eaa96ca61224f43a6d20d5fc136af62ff8a8b92faa72a92c. 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/TCAHB2351380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2ba20c9a701924dd7ba78842911a816998c93652d543ea6443a4ab92db64a46. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/TCAHB2351418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78a0eab9c8f529563b85f4b93d4405203f438ad851cca9c1dc306926dd9ddc1f. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/TCAHB2351496.