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 0xa4762377e44437e2b2236d90cc998dd6505ab33ea2bbdf1025b9abbeaeffcc4a. 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/c60b350a-7de6-452b-9136-591022ebf85c.json and https://artists.proofprofile.net/proofs/artist/c60b350a-7de6-452b-9136-591022ebf85c.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 0xa394c6b30181c051a1536332fb14d3fcbec7654d8d75980b6e605a5d3e3e5f20. Chain 2 (Bitcoin): anchored in block 956748 (2026-07-05T05:55:59Z), 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/SE5BU1952271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd132261a15de448fc73d983421b40d510aff56ef1e7edd22793f7fd8b39b61a9. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/SE5BU1998934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x974b2718cdc2a0385ad086937a7c4cf828462859c855c75b7f7cb74a7d10fbd1. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:48:48Z), 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/SE5751957800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec902dce2801c576268a3c0e6455997a1a872b729a3a515868fb844abed539d9. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/SE5751957838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x804105198a2535ed2e9412350faa768935a0cc55dd0f658e0c4305e35add8754. Chain 2 (Bitcoin): anchored in block 959003 (2026-07-21T14:40:20Z), 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/QZFZ31922175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8b0711c486002af9feafe004e96d2f40d05bc58cfb4f54ec045cc7ab8838550. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/QZFZ31978160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b47ac5296b3e6c0c3d18a955aab7939c626c9cc6ec2185eaa60d7d179d1fdea. 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/QZFZ41905113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6144e0f0c0f8564e75b7b7ce2d31942c3e753a7c8fadf4cb70d212053caa13da. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:45:28Z), 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/QZFZ41985201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59686c48def966718dee2bd85f4c0848665a65c6ae41996e690c78fa14dcf677. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZFZ71949334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ca6a26c28bf86c6cacfeb82dfc948cba5e7b1f33d09541f1310b4b78ee884af. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/QZHN41939554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa187a2f08ec4211ed85432c4272275e348066469f7fd430c78c7b7e17a8cb8b3. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/QZHN61912269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3540c9beb143e28439026b974595bbbe55d63db34b80264971b3203d97a282e3. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZHN91912714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf66b122410a098022c421c5831008696ad1203f15392df81a79021f5ec89df6d. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZHNC1900770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb1b579924d4c49548ee2e198656fb0fe501c803c48ae26a91a6007346904243. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/QZFYX2038178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79b42c195afdbad56ae32d7f3357dba3ff55107b843ac33e9b3ae0001607b998. 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/QZFZ22058580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58ed75399ab45870f82404c46a2bd87ba10e4d4cbd0617a6fb01429c133bf573. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZFYY2154024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd439496175c74804860bde6f579178095f2559ed525d844cc314a7a3c4996c87. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:09:18Z), 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/QZFZ22169024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba14c3d76e2c14b251fb825dabd80cb7d60bf63d4e279002e356272d1578b2b3. Chain 2 (Bitcoin): anchored in block 958992 (2026-07-21T12:07:06Z), 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/QZDA42100293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75037818f91532715dd1d80e9950e99343e8125ecb314d6fad33d33e8432c92a. 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/QZTAZ2213979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde6eefd0ff6989c5f987830b63d94be5b872025f8d1bf1f0d5371d3095583638. 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/QZDA62484744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7aeae8c82e3da552d67dc1d68e84290330dc11d0fc1c77ecdb8c4593f5e8ad61. 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/SE6XW2287867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06ed97843830db352d12fbea3cb323429bfed052461af606b6c7c10fef327116. 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/SE6XW2287873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3624b66917d00fcd7fc467d970854b09e0f77607881a1ad56d2e858bc402de87. 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/SE62M2154039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5c9c9dba23da8ee42317f1631d74b41e6b91ecfc1d1fe26eeeb378c2934068e. 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/SE6TI2164185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcf58ed7d9b8cdec9ef07fa5a82904802332955344d27f9516f1c71ae4cf920f. 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/QMFME2119144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9df49f5b89435f4ea1487e8195a0d01222bedfbdd33af7d18154e66e5ff369a2. 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/QZK6P2263247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78badef4ae7ca7f9d28f4426278fcfa2e74e6a801005cfe04fda53205d1f7076. 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/CH7812351407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa422b41d58d270abca85e63338ca71b84d6e19974e3f30cc62a18dafff0de9a9. 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/QZK6Q1981781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7ffaaecb5378ca1e8df4640aa9a3fa03ee3300f7b807901958953e15f49b7be. 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/QZJ842400996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbebb7bcfb4705e0679d6a5c561c3b3915fa4a18e32c69445c42159db1327fbcc. 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/QZJ842400270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbebb7bcfb4705e0679d6a5c561c3b3915fa4a18e32c69445c42159db1327fbcc. 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/QZJ842400270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ce77c96712012a4600a0994b6b51071e43ed39a5681145bd00b45f321f7fe1d. 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/QZK6K2038963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ce77c96712012a4600a0994b6b51071e43ed39a5681145bd00b45f321f7fe1d. 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/QZK6K2038963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa3e9a5b31ce61297ae2ed6fd84a92aad2c5fbf8f9e097f08813565bf2e12c9e. 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/QZES82098068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ac2f2c855cdbe257f412459d9e5aea65fecc651169e1d3d960e2c01144e55b3. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/QZFZ31970881.
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 0x6a707d233071897e413330fb2b7906f0ab1f777ec5b6628a24b53a9099f0657e. 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/SE6I32246454.