thumb|Rhodamine core structure thumb|Rhodamine in water Rhodamine is a family of related dyes, a subset of the triarylmethane dyes. They are derivatives of xanthene. Important members of the rhodami
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9281fd56db555c68245b94cc1ee9c50759060b3caba163e37e52f0376be50988. 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/cf89a5f3-9000-46c6-9c06-2299364d6aaa.json and https://artists.proofprofile.net/proofs/artist/cf89a5f3-9000-46c6-9c06-2299364d6aaa.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66cd1166d71c193dcf1961dbd57ac31e44833c1eeccafe325e22aa1a7fb1aabe. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/AEA0Q1923216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5d07d761dcf0b6f9085b76c61198db88f66169398cef83159cad3f2217c9b17. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T04:59:09Z), 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/AEA0Q1967019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb7d6a34a63e158414923b7568501bdd47375d97733ce43703df7df90d9ee97d. 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/AEA0Q1967022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa17cdd53e7c6047e5f1e1aae6d5ed8cbec68f54bfa11ad741230ebd958c1b296. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/RUA1H2047022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5abe9ea7fee04fb6631b7f263f6a507fbeb97967ea38218d52caffca955d0c6e. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/RUA1H2047029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d36b595a457300c98111f3b994b9a91a6c27f8d08cf9423e7fd401d8c9c8b93. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZNWU2034165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b0a0fad69fe75efe7892e6ab523ba768c962c32145e582b1fe919710c022da0. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T05:48:56Z), 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/USLZJ2169198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdab8a02cc3553517ac16a7b4e1cd8ed190eae38ac6934fffbe3ccaf24902d589. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QMFME2166525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30af8481adf835c57433b4abe37e37c8b79c44730b084e703f7471254fae690a. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/QMFME2166611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf94cbacca1151bfca1d8cbcb4f1892e09f29ed273e762f339f90aecdb0bbeaf7. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T18:22:56Z), 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/QM6N22282040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77997b0bb6b367fe796dcaa5ce477a0dcdfc1baa6517c387d53ff4142187093b. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/QM6P42204249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84c44c6392fc37a15b7b20f726e5a2b0b62fa9e87a9a7f1b34f2be92a3670d93. 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/RUA1D2290082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14decb6e3452bce3dbfcaf65f56fc2827d81b36c8e7661b01f37bcfd9175ac61. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QMFME2258604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8929250309570e4a127da351f017bb1fbfbd8c60817217e44f0231bf67df62d7. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:27:58Z), 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/QM6N22371084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7ac1d0c8e25ab5213071a1f2cc30df241ce37b1f177950245f66af42a48dcd8. 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/DGA0Q2347426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7682c517d45efb00e02faff9dcb62941303dc832c6b9ab3325dd3157a0ea74bf. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/DGA0Q2347428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7255755d11888d44e1b2c41ec7ea6f998e3546b80857c26f3a833b9dc9a796fc. 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/DGA0Q2347429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed4211fd4c3c45f4af6d538798e5ad6d28a1650f6109f313683c3af5def6d8ef. Chain 2 (Bitcoin): anchored in block 956748 (2026-07-05T05:55:59Z), 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/DGA0Q2347430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd59b1ce091f33119f02905525db7ea4dd2aca581fdce963fe43ddd786fcbcf6f. 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/DGA0Q2347432.