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 0xf254ae1864295694e9dd58ef8a8b3f6ce9fff69c6b24148b94283a923a994405. 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/9c6c4c11-f58a-4878-bd6c-f67c1368cd2d.json and https://artists.proofprofile.net/proofs/artist/9c6c4c11-f58a-4878-bd6c-f67c1368cd2d.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 0x328306165cbfb43983a202bb096fa27ed4b166edd0c5737cc5523a628982c6c9. 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/BEEJ12300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40c62fba4714673c74174ffe01d6c3e60bd1a407e9b0220003afac1d9f33f662. 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/BEEJ12300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f1c728b13a3396fc20cf8ec63d5ce390dcc04ff0c15dc3234b0b91501b31cd7. 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/BEEJ12300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcd729dfa7b40c0653ad10837b1cfff8b1bb70bf0a1a24b28a7f710d9f94abe1. 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/BEEJ12300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e4b680b43cab14abb7693452812fda2919f7bc74cbd1087b5ee794c68c96fc9. 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/BEEJ12300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccd2e85fcf846f6f26603f0b8a76a3a1a762f2de394d624fc76b8852cfbe74d9. 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/BEEJ12300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2110f34b88d45bd2491f7a7afd13522c418e75959025f06496f174ab7efeca33. 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/BEEJ12300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf84cdde38b10f759449b57a2b4f171b31918badd0f56b223851c4a6eb07f0867. 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/BEEJ12300008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9170a8c805d8e65d9971b3f97e720f1f99b0ab1d7ad8f8357e0243d53843e559. 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/BEEJ12300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6508284cba098e8b80ba8685bfba59de855a15a5aea6635a54480d6dbc1b0296. 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/BEEJ12300010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3103fbbc79cea2676a64704ce8940d3cf4a855c2b2dd740194a3771101a3bb35. 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/BEEJ12300011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb4730104170c0f286a20c95947cedd16f35a8facff623c57229b5258b7fada5. 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/BEEJ12300012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb5822ebfea9f4694619dd84968f992b5d52890ef34a6582337b86f15d86b6e0. 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/BEEJ12400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8907b194a63cab36850a2759364a32d407dfd5ee33ceb16f582b5e064779c8b4. 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/BEEJ12400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f5a29107f1a8ff26149d6eaa99549ec202b830994b90ac4a75a6d2474fa508c. 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/BEEJ12400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08fde2466e79e5d739509163e027ff12e1f386e67789e75a71918f5c546f4c25. 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/BEEJ12400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97f0a7ffb555e68ca32edc2ac59d706de9ab4d3223067b716e13857f534f29d4. 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/BEEJ12300015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcd729dfa7b40c0653ad10837b1cfff8b1bb70bf0a1a24b28a7f710d9f94abe1. 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/BEEJ12300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6508284cba098e8b80ba8685bfba59de855a15a5aea6635a54480d6dbc1b0296. 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/BEEJ12300010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1722bb9fec421684b0222969eeabac3a8168e05ef0ea2791c529a2c41deab5fd. 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/BEEJ12300013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3ec6b653842f2f44bd8c6c4182912a52fb95def88161e793d1bdaab324785e5. 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/QZK6Q2400110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bcde9dfb8c0f77a9ba514f2a264076f0e2bd6e14aa322719eb48895f493b54e. 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/BEJC42000006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5acd3b4bd2698ee92717eed4c4af55a6a94c8db929024faf90809bcb4628bd18. 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/QZES82489986.