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 0xe9f2762a5d064afeff5effe4764a4324aae38807a00aada8d639acf51b795f62. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5a97f323-6a05-4b74-9747-37b370f83774.json and https://artists.proofprofile.net/proofs/artist/5a97f323-6a05-4b74-9747-37b370f83774.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 0x1b6f42a2e21389caf440e852b567be1d15e2c681c9e70f9841a96589a6c2b593. 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/SE5752363464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf19079e90f6f563bb35cdddcfbf0144d35cecc586dfdad86f6a0d11c7811c567. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/SE6QE2341452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2573230acdb571993945175a1cd3ad2effd75bc17861940d43d4bbdccbd79fa. 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/SE5752392592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31383ce598467fc0b0a87dcce08b477ca561ff6b8cefb5a885304d0e5a8b8421. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/SE6XY2344989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea2726d3cd8ac09b9bfbb3ec0d89636deb78fdacfe9880efd0c8e4eca50c2b32. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/SE6TI2380206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb479c1c85a3903fabf66fa64818c555d8c57c6e1c5cde9df4e829725c8852e3f. 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/SE5BU2311793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f06d24aef4073c269f20b75ffb46612badd1b1514824af3af7420061a192572. 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/SE6XW2382029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf21be231518821e661fbd266b34ee0fd36d1877c1222750b9777d7adde4b81c6. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/SE6XY2535728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8433ecc429ebca50d7558bfcd8cf4213b896d29650ffc813e878b24b5e696556. 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/QZK6L2586448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc49c48346bbfd18592a6033146f0417c3ef8464294f302e4e09a8fa3661ee8cf. 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/QZHNB2500451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc39c433dfa764ba95580b0edc989cf505be25f2624b2bcee151133bcb09b999a. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZHN62572321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f9bf941bb0a69979fdbab6ddf8e164b3f240b97cfb7cdb1105a32315f6d5a79. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/QZES72524230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5b2417dcfecc9dc2f1a8bd33ccd1552f6c93f14bfdde62a428ebdef24039c4d. 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/QZES52536842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b1ee49d705220463279845250835333a65970ed9bca2bf417be62004d4d27e8. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZFYX2566156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe489182ae6d2b99fa84ef3ba89838ee72d040abff3603c11a8435c55aaf5ed80. Chain 2 (Bitcoin): anchored in block 957067 (2026-07-07T16:54:37Z), 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/QZDA42523166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c542b4f36b1b8cf11c4c9348672c395da002efb9c61dd7a14f95e8450dd72f0. 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/QT3F42409235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f242a3774f790e23809aebe583a9f377f1961e0d490d455edf2f9788cede1fa. 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/QT3EX2409785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca7dd0c5324da43dfdf36dfeab05a8e8e3cf9b3574c9b81d897d2d3cc3cf5a71. 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/SE6XW2401887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e3116d9336f30ab28a83983e15ea5c9459789f9fb290cb80cee2aa84e12e503. 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/SE6SA2493146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8110708b4a04ad6cebc41e4357ef3ba9dd5661f3eccbc43dfa6ccee440e88294. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/SE6SA2461050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9c94b061828a899162517b24092858a14b27c83fc4a5c61cba90239b263f82d. 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/SE6SA2402135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x876495d716c6a6070953c07ed7366bb26790177828e07b3f19c033edaefafdd7. 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/SE6SA2426793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a9c901668d3b179581df5a328217c7d057126a59be5efcbaf136ca99f8c8ae4. 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/SE6QE2483168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6905fcdf70f6af9a9ee6c31d318eb44d568c1efba9fc69c916b22b91062dd53f. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/SE6QE2427341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51eb58adb81282f8c49d99274c82512832b27b62b3a6076a583a8feb599423db. 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/SE6I32447593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef6905a1d90292759b41542a13e84716dcbe6dcd2f87dc21faf95e71c00f1930. 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/SE6HN2464416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ee8e5f5a9dd9ed4d360bd378d095a55dd0129ddb916237d6239fee3d9fbb6f1. 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/SE5XG2405631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd480ca13e76790c5cc794693c5d5913ac4ceb4c9817e663cdb21f867bd4ddaae. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:23:28Z), 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/SE5XG2405622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49f62de527291816c89cf5812cc764a174db05afa04c6a0a26766bbf181fd54a. 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/SE6A92373003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2540699839dc7200377a75ff34f4b1237363812f7cdcdee2701af537dadd36b. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/SE6XX2352676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae3028b6bbf3582fdbebbe4057a04edf932e007b88e839ab48649472e0e37137. 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/QZHN72288756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x694e183f0ee70fdec724415c6faef373bcaebc85729742e74679b0dd0e57bd40. 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/SE62M2203462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4db41fd48f284c321bdc0d470824fbdce85feccc0b9221000c3a3d0f8e7c1016. 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/SE6SA2201432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x526fd45846ecda35d2555ac9c14f61384442656a5eda0ecc1af452d0d8a4054b. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/SE66N2246734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac6f99bbc82bc482c15e8c527279692c274ea0eab841f923fd13d0fbf585d785. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/QZFZ22274371.
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