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 0xb8e4889f95d06a298d6bd82f1718bceab523cb0fab0e39a51c115c9d3b6a0388. 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/128e4ff2-7642-4518-903f-7e965e04bdc0.json and https://artists.proofprofile.net/proofs/artist/128e4ff2-7642-4518-903f-7e965e04bdc0.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 0x4d27e75495fa6d8019f385b9731fd8995438f46501fec9c3d1a8f2446b33f16d. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZ4JJ1766935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc0fbe8fffa051310517aa35c9e85584d41ce19173978fe4c047d6a32a27f1ae. 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/QZ4JJ1766936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee0958085db6fdc3fd97a3d0da1d890eb7e4a98dd521aa762809ced1e3374a01. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/QZ4JJ1766937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05030e4906024bdf507c612f65194a90ea32334886af5a713ed01ec003f372e0. 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/QZ4JJ1766938.
Feels Like Your Best Friend Is Going Away Forever
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe92f1b0d62de5eec7a66a818a54cf8f6dd5ecbf1f67d4d376b7fe9b9d69abde. 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/QZ4JJ1766939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ce420b88c91206fa56ecdf597a64f901b7c390e8e8251971107492aa2e4087b. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), 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/QZ4JJ1766941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13852415b2df44bee4d6c8e6284f34082e2d4674eb510edf0b7eedb65ca127b9. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/QZ4JJ1766942.
Spending Eternity in a Japanese Convenience Store
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8647e30420822b29b2f6e6e8ec35c8077ca381bab680b31c365f7f22693f68f1. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QZ4JJ1964635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8aa38e9add2a96f3b295292298b369d08f5f2e6adb0176f1ba97520f1a7722be. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZ4JJ1964636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa79e78bf850000f0ab9c197775d47d1fde2678dee83d7571821156ad381730dc. Chain 2 (Bitcoin): anchored in block 957680 (2026-07-12T09:07:22Z), 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/QZ4JJ1964637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3d0351867c33cd94e0ef6753adeda0de80226e43ead175a352fd831625c98f0. Chain 2 (Bitcoin): anchored in block 958703 (2026-07-19T08:36:12Z), 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/QZ4JJ1964638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15c434cc984d53b40899196ed0ec2ea1c4571f024a8a81a2d5c7412742952154. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZ4JJ1964639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b9098fa4bbaf3ac3a8ef417cea3b2102172a7d6b129206e2f3553afa4c2a7fd. 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/QZ4JJ1964640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3c4147e435190299c35e4be2ff5f1d845f395421b905a9482e516d5cef0b01d. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/QZ4JJ1964641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2c36eb21be9e423baffe1eb97335bc18c419e944a999a593808e301144ca7dd. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZ4JJ1964642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6178f5c4cf22cb3249f6690a09fccc3e96c55cbba6f905c38c50fd9448c8110f. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/QZK6N1928621.
Get In Losers, We’re Going to Eternal Damnation
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd650d1628ca1cbcb65059e607416b034791e364eccdf9162e853a17cedd728f9. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/QZHN72239939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf70d279272db32ae3c54d4181143b046d9582bbce4df0832c49e3f219097f050. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZHN72239940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x982ecb87341f974333148c1bcd99731bb309765d8d8c2a45d1a34d883ad5d501. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/QZHN72239941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c2cf3ac757410967862b2a7dbc837fa06fb49b9a5325572bae81a4c32a498c1. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZHN72239943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d6523b49f8a0c1c786cb5a1c7e7713e315e692c9baa7909f82fc55f7361ee1c. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T20:03:27Z), 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/QZHN72239944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83dcc09182149965e461332ca335b2e51b0fd161fb8575330bfbc29c3651d44f. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZHN72239945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x300fa2d898d6d91600a96041beb32ebf22455f748d77c96f00a749811df1d504. 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/GBSMU8657328.