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 0xa09f04f0c5a4ed973bffa71a8b7610002d6074e4cac309866d3a3d623f552a33. Chain 2 (Bitcoin): anchored in block 954569 (2026-06-20T14:36:29Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b1f9be75-8cc5-48ac-9469-e181c3005d34.json and https://artists.proofprofile.net/proofs/artist/b1f9be75-8cc5-48ac-9469-e181c3005d34.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 0x04b055259d8dfe1ad724372c677649756d3ec9bfebbdd8c67f7f0c8e62d3706c. 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/DEKB72050418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5453c000f5550dfbe9e2f369e9e5527d0817669efb81c2a63bc71d5d40560e2b. 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/DEKB71612829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x208903166269f74318ec9994c5fa29476a3a518172118fb9b210bbf1a582535d. 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/DEKB72073091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa6481a940aeb78c7830ab9a6eac890444c7a092e2b2068291f80b736c63dcda. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DEKB12345678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd410559a3ce426af4284e4f28b375ee9d1142566c89a8c1a5d2a2fc9969b9246. 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/DEKB71532589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd7c104b01b3779c1715e23713367cafff259609a92f55b06f7606f3a030f9e3. 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/DEKB71532588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd71a9f949a107f03d80838a868a504e604d94cb8a55420514d02cf913fb12ddd. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/DEKB71532560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe80268aa571c2a3e847255e6e798ee6de75f40fb0422eafe553690f8cac2ee54. 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/DEKB71532551.
Distress of Hard Techno & Schranz, Vol. 4
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f784700110a5554755c417c03dd748a317dac49f447eca0596b44e9e8113475. 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/DEAR41214537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc3087c338f89abee3ac6a96585d1a6dde621e5db92b69136995315fc7977350. 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/DGA0H2493838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd53862fdc3583778dda43c92e67ab8ac4f56f29c4d1fe25eb7a90be2450f942e. 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/FXR752402004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbdf2249bac9f07897fc18c179fdaddf1efa1475c6b08d1ca195816558445eb1. 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/DGA0H2440192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a4cf40413a425bcd5aad2d481af8ea18fbe4a1ea229bd88acb76c42900c1552. 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/FXR752402704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46539f124799a5ce594112387c5a9e23d93a4d84600f63aa89ed3d11a64d8da4. 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/DGA0H2479667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94b9391d5596e833f12b0c584951a28958ac27fe3fd084d8f476fac99b385594. 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/FXR752402841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb42a2b7dd46ba172c5ff7219df9a21f91a4521ae3445f2ff154d5235592f54fa. 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/DGA0H2493837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc78936b7c98b31a2afb4115c1ee5d56fa3893ae57f3af8bc5b87d056082ce321. 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/FXR752402897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc3087c338f89abee3ac6a96585d1a6dde621e5db92b69136995315fc7977350. 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/DGA0H2493838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ae684d3d91066b151814fbdcfa44072340dc913e7ed59b6a196bd8a8a2c61db. 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/DGA0H2493839.