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 0x14b4ad0acc09e6c32ddca62195be7e4b5780047247d5dc0e318a5b8b7a58eafd. 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/54da470f-2ba2-4d46-960d-e0cc985753dc.json and https://artists.proofprofile.net/proofs/artist/54da470f-2ba2-4d46-960d-e0cc985753dc.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 0x35cae0721d7a8d96d096e589011347b32d6dac4992395593986c3eb865d69b10. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/USUYG1010713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd65b3afd41472697dfa35438463cb995447fc907b477905b5a3ab7886e9fb624. 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/USUYG1010715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55619f46b2a1a1bc6c6eacfcdeab351c6e546d5f0189fce477889a573610707e. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/USUYG1010720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6ccac0ff1e4a2874f58c0d2258f31fb0efe122df70d3df2bb9f0e352c02c88d. Chain 2 (Bitcoin): anchored in block 960330 (2026-07-31T00:58:21Z), 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/USUYG1010726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00edb1628ab31818610b50cabc08ac23153afdf8b889e32dbf434950a76cc882. 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/USUYG1010729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd73e4f2cd27c4839b074fcb0396c5d0a7fe98a00a446117fc985e5b922aa9ba2. 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/USKVE1010005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x144fcd25c98d1bf1d34b7cb9fb9d416c2a1430da4a662111413c56ed8c86e281. 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/USKVE0710002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48779cf46059ff7a6957a2c3f43f8e84a50c06693a136110d5197dcfc2dd7dc9. Chain 2 (Bitcoin): anchored in block 960288 (2026-07-30T17:41:38Z), 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/USKVE0710003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6af6dc6a1bd3b4af7714eb3dcfa278834144a75d7e0a6a5c8c0116c37f7d03a9. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/USKVE0710004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bb11e91277ebdb44eedb81ab142c02c2f1052d7c488e14fc6bd4312b0e9e44a. 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/USKVE0710007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefba7730a52f89a26a9eb448f2d9082a4646a625a61af9ec8e8cdee99c31fdf2. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/USKVE0710008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9529fafdbcd80d1c2299f160eb8fc3e6d7cc5f86f19c7941000bbe792bf0db4c. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/USKVE0710010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5b84539edc6ddc6ed155358a14cf5ff67e03265b34a291a95df4b49d294e037. Chain 2 (Bitcoin): anchored in block 960191 (2026-07-30T01:51:26Z), 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/USKVE0710011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16f590feb45f0db12b5c5ffb25393633c25451753a74de9d48e15abf74767028. 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/USKVE0710012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf211594a360f8bbd5e905f732f4f72e94c48dd884dbb0898d47501f167944195. 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/USKVE0710014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e75dd5489b7a4169201d298ec9852c93267d9467a9eee33059554c34e2b47e6. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/USKVE0710016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6a7988b201fdfb944140fe9c3b9c3254b68e5433255ec772a97f49ad2b9eabf. 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/USKVE0710017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdefb3ac1359d56e33353dae2872f42c5d627211e86c9060f1655f4a8d3344e9d. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/USKVE1010001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4eca501b0869421a16a2d6548979b22ad39e24996bcbd469b9c2b8cd656c1d41. 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/USUYG1179592.
Iller Clothing Presents: Iller Essentials
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc337d092132b9d03fc8cb9c085a84d7959a57e8559145aad8d11d7e9f4da4478. 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/TCAAU1148122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71e4074e266446fe40e4c7f5e37337d797c1190491bf43a03ce39b4725dd5294. 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/TCAGD2275313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bab20aa590cdcd4056bc04c505081f763e68245b88b3be0a54b39979918f162. 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/TCAGD2275334.