Detroit ( , ) is the most populous city in the U.S. state of Michigan. It is situated on the bank of the Detroit River across from the Canadian city of Windsor, Ontario. It is the 26th-most populous
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 0x721e2926d7bc9df482658a7494ad8707c2edda3b559b3b5298d5118b6ef31a14. 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/24fa624c-5852-4c23-9e52-b6256fb07824.json and https://artists.proofprofile.net/proofs/artist/24fa624c-5852-4c23-9e52-b6256fb07824.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 0x312ac14026ca1c616b49a89573791bc03472e98d817e02a255617076dc119f71. 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/FRUM71302769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64e19e2d86e920f1c7e09764b19edabda12557cb17c8a70c9c8ba8e6b39a4591. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:36:55Z), 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/FRUM71302768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c14aa63a7a7e2225340fc24ac9e5c6bc51feba6a9026942bf9c7793dc5cf10a. Chain 2 (Bitcoin): anchored in block 958554 (2026-07-18T13:17:01Z), 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/FRUM71302867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4afc14da65f9f52f23ce45adc1da097f05d86ebc7ff07d9ec54b28deab2016a. Chain 2 (Bitcoin): anchored in block 958554 (2026-07-18T13:17:01Z), 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/FRUM71302868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65a1f321cef56073bc27cfeac45b03bb334bc7c8575fe85d4e8f7a8e61587f83. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/FRUM71302774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x456da594f6e4b7a832abcdfc28d37070488ba85b025257825afb8dcfa0f08d8b. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T03:58:59Z), 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/FRUM71302770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd9ea3cb7fe9fc367231dd0eefc7709445092d5a5fe13d2098f77365c9f40871. 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/FRUM71402250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26b80b9a199cee97ae3bc904a6f3bcbc8e6141c3437e1b93c14bb87299859c0e. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/FRUM71402251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab43905d00be98c764824db431e68176cbcbdbb15f6eadbfa44c894d4dd22d0d. Chain 2 (Bitcoin): anchored in block 957690 (2026-07-12T10:16:40Z), 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/FRUM71402253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x092014562114bf5ec9134d282dd99dec357c9129e6ccfb3c907d724a1435af38. 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/FRUM71402255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34437b636300fe97bf7e6db85a5a985edaf94b021d94413a90553f843e4c6896. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-16T00:26:24Z), 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/FRUM71402256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a411e8d0a1590c1cdda8e0c02ce02db6972dc567c5beeb51c456209389b8add. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/FRUM71402257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6f2ec39ca47c09e6ca58e257ff5f4ab88326b046b05030ab3b9634fa667373a. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/FRUM71402258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce025492cb9d169b1a6e5c5f663718799bef8c0437daf1292a42e507360c60c6. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:02:21Z), 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/FRUM71402260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x037a11f053b792107df131eff8b8fd43e63242f8582f6c508864b95078d5781d. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T01:45:56Z), 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/FRUM71402263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d9a73447184d1064d92a7267d338198e9018d7665b52f7965a8fa541f773ab6. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/FRUM71402265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbda251679ee7c112668e3cb2806330c5018e7f7893ce205c1287c3ef209f2df3. 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/FRUM71402268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9f6de1c2a99c2dc7281d5095175394605b2fca691619b6ac5387b2bcfba4e6f. 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/FR9W12451224.