class=skin-invert-image|thumb|200px|right|2,5-Dimethoxyamphetamine (2,5-DMA), the base chemical structure of the DOx family. 4-Substituted-2,5-dimethoxyamphetamines (DOx) is a chemical class of subst
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 0xa3bf7c81d428c474bb1ee8b0a5dbcce0f5463ecc7b074889594804a9be65311d. 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/2360c032-c03e-40a2-bdfb-d45e403e9dd0.json and https://artists.proofprofile.net/proofs/artist/2360c032-c03e-40a2-bdfb-d45e403e9dd0.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 0x94b8546bedf24881fcb88a03e166a9415945d5be2694ad5c734c9765ccebc84b. 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/DGA062228819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7298f7b85ed497003d939999d837c16f72aa310768ab9f51b757c0fd4d04966a. 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/QM6MZ2584999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93fff1a5ce70137fe12a41c0d51cfc11519f6bdc3b725729bce7d1adb7016345. 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/FRX762387084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59c7ec3ad8143b027631be5c24656b07c19d368618cb55245403f0acbf7facfc. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QM6MZ2584995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc938737678e4e13ba5af906c5317d4ac8d7f8939b3f4104067a21aa94896815a. 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/QM6MZ2584996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x137377a96e186ce581eb0e866eba66a0811fc697c8c66bd4940aec18b47a2aea. Chain 2 (Bitcoin): anchored in block 957025 (2026-07-07T10:59:31Z), 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/INE182326338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5e45f9a4170bcb15ca0019c207d575ceeaea72a30887697b1302511b9f0c2e7. 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/INE182326301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5e45f9a4170bcb15ca0019c207d575ceeaea72a30887697b1302511b9f0c2e7. 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/INE182326301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b419f53680722552df52b2c00bda1913b5d7113bedd6b9b2cd8101a2ddf5bcb. 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/INI112177801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x084f3569afccbd921c431665f83be6223c4a8d3946d18e2b5b0c5fcc25e2e87b. 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/INI112177802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a16388a424c7801a55c6863e4cc008808f12df31369810f079e3b512cf38149. 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/INI112177803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a3366a7e4f4668b08df01a37178ca95c9d379cf4150c9c95988ecad80b5fb14. 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/INI112177804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa358df976a8441bf25641518e2a469b67b294490ef619c77d92c96a64067abf7. 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/INI112177805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x914104bf6a568e863535a43c2d63ddf0ea305cecc43359fa0d9ef87dc148faf3. 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/INI112177806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bcb6bc1bc52b3bd0710b9e52152a8f63732ae0412530f35d043fc4245ee0045. 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/INI112177807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c41e5eb105f44273c36d16d9dc0ecdcc10061ebd064958771944eb3c3e7abe4. 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/FRX282317789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe35bdac4d094094aa96b69089d0177299332b4927ec85d60a02e6ebe00309826. Chain 2 (Bitcoin): anchored in block 960387 (2026-07-31T10:06:30Z), 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/QZK6P2161651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cedd1b58ed0c5d3929a236a7adf31ceab0c96e7dc45016b4b38fa9aafd97872. 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/INE182326468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5e45f9a4170bcb15ca0019c207d575ceeaea72a30887697b1302511b9f0c2e7. 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/INE182326301.