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 0x660fdf05f62ee2ef2e93d927d51ce54310f1715d91a05ee4bc1847e77c4bb6af. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/83f3c436-8a35-4063-b183-a92243b28b9e.json and https://artists.proofprofile.net/proofs/artist/83f3c436-8a35-4063-b183-a92243b28b9e.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 0xc251891bbe935d44f65cf7f160091054ddcd9f13b31a477bc6558db73418d030. 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/FRX452451221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf51f77874bd71877846bf01f0946d6f6c81d438f030455e1d9b87e2a018c7011. 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/DGA0Q2373417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb88093f6ffd3c7d9fcb5d7afef4102816df9ee78627c5fa9fcce0252c81d7ad. 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/DGA0Q2373418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea258225f0942a69eeb0781bdc1efca788148ddcb766b80c31c4041b78db219a. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/DGA0Q2373416.
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 0x991416097e9c4653c692688b07ca3a2dcd3892417bbd4a76d7f3cd234f8d82f4. 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/QZZ662321125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7922f88571248ab365f31c1d07401dedcd19fb0e8ae4c96f43579d591f02d91a. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/QZZ662321126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83defd179d6d40ee8ca0f40db565264b5b06166ab7697fc438d3bb78d9674978. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QZZ662321127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x769c0cb71a1da3a61363b5cc631fcff5a0843481a42c479f7376680aaa60b2b9. 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/DGA072372689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e8c08a9e57e584aa7e64a3cdde018b54b0bc1221f4a814e8ad2aa78cdf28bf3. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/DGA072372690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69814609b5faff99dfe34df548b611f324f970915f6b36860e41b0cb1edb90ef. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/DGA072372691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb82eca3b30b307b3ec52497e6633a9fbe4110779b84bc07be6a0707f3afc7ec3. 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/DGA062333464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce20087c762320d821bbc9bf0ab8611c7fbaf3707cdc3c11de261e2a80a36605. 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/DGA062333465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f8a1f86b63291387ab241ffb41bd5bbfa44d407e060182b09d537b6f7dad631. 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/DGA062333466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a1fdcec32c786a2a47c72c441e5e00be189357b346ecc4350827cf3ccf8a28a. 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/FRX872396248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x978e349a3ec56bbd6382d9775c621c0cf028eccfecf64dec152bb484117e52f4. 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/FRX872396249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81937a900d32a2540f9ef93a47e594a3ce3dd714bc925b87b1d1bf5f336c84dd. 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/FRX872396250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x195c9f28b391c5184c3de02f0f855988cea433c3e42d622cbe4fd589876202fa. 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/QZWDW2370859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2de60b2d49df321721e248b9839a0c04f7cd7dee87b260c863cec92c1dd8f118. 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/QZWDW2370860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd68d4946d19ad532491c83b6da9eba1070ad05ba2d82fd41d6a6d8a9e4fd6eae. 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/QZWDW2370861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb943776809856afd572a9f42a8c2cae78c308afadbb111735e9474ff8f910aa. 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/FRX282303366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8779d0187a5a5dcc52f716c96f29eb9a2b5678538ead930f19d0692699821757. 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/QM4TW2332852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd45edd0d68a42f1c459c685aecf073a84feab3b281462935c219314956cb8797. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/QM4TW2332853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaa6e5d000c62e834d90c9a422599734cbd362b99602d7ffaea9fafd8e71e7cf. 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/FR10S2343150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe050625d0d164fb838ae68843dcd048cf705e89cb038a5b73edc41b673a02aa5. 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/FRX872248909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dc6de32d43c09f59d3262252d268c9c5b7de72e2160f4284b20c9d7558080e3. 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/FRX452296020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc866e2f896d9e1be28fd5d9f7158c037f4f1e33784800bbe9f0c907aa39249a4. 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/AEA2M2290191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb06a258158b9213a525087ca0ca1ad12f4062ae07cf1cbb40dbb89e852de2c88. 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/QZS632280056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98d26eed216106eba25f83651c71f51423eb09480c4473fc17372f0395da68e9. 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/RUA1H2229368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea42b7b966d86bd6c7439f419edf6cf516cbc3b0a6541c18fd8d92341bbd83f5. 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/RUA1H2229369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x591b828ec5af9721d754563e00900044d56fb722243983560918750f69204e21. 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/AEA0D2177098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaea86254aea376a0a5e02b0e7a99296ff6d659cfde1193f2226c16f85799a88a. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/AEA0D2177095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c5a595281d3f0becfd51f68539864fc7285d5e7d944af152d438f21a2ee2bd7. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/AEA0D2177096.