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 0x6df9404039b26258d785bed06f27017927f27785c673fbbadde80d4393407c3e. Chain 2 (Bitcoin): anchored in block 953719 (2026-06-15T01:07:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/892d0220-667a-4d95-9154-8661b09df59a.json and https://artists.proofprofile.net/proofs/artist/892d0220-667a-4d95-9154-8661b09df59a.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 0x88311c237f06bc0a5b2810a1808bc3f96fa1ef87589a25d1ecddd2992295e732. 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/QZNWY2153568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x861440099fb575f95f9b98c1b8b24b6265667efe0eb753bffb575d053e0c8269. 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/QZK6K2159811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8e05ffddf6c04caa406b5dd63b877e06c96395e174e8ed3aab3ddc66d5d5770. 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/QZNWS2169772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37025b536439078d07a1d07fb27b980c04fc1990f2f7887d46adc3e66aee95e4. 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/USEP42205012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf379dca8dc1a7e229d0f779a3f2360ff787f49e4884e0d28b8eb12ecc5af7ebd. 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/USEP42304002.
bittersweet teeth - bixby and NOT A TOY version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd013d59027a7efd6d6c5066da4a0cdcaccdcddb00aee18c74f681d7e24ebb9ed. 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/USEP42304003.
bittersweet teeth - sace6, Ezra, Picture Us Tiny and noahmadethiss version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05bb12bd7068d30b9238087268c217903128bb331de98e21509afc2182d209b7. 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/USEP42304005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64aff2a39a0516db3ea3ab4b089184df8f527a8294e7e8fa9a5070aadeb09337. 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/USEP42304007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeba68396e60a0bde3cccf4245e2a20b3543e3eaaef566bb5cb57734233fbde7b. 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/QZNWV2161481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec8ddca972129a0650cc51faffa2d0abec8da99f8980bc121079fe2029328290. 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/QZNWV2161482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf128415fcbc22fa93840f806fb02ff8ee529cf0c8f77100d328bc1cb75f6b5c2. 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/QZNWV2161486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd59c527a3a8df44c47636131ca0443ccc7707719e4a3aab49344cf788eb31589. 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/QZNWW2195908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8615bfe6a4ca44d8363f5f16ad1c7fec03dc897b1179ce77f6f7f2f8c6e40503. 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/QZNWV2161490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3bc9d295f02782396390a92b1a21dc2233bbe74fada52c5d89cdbd0b39c39d9. 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/QZMER2119143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbaba891863008941aa95ff68b5b9636dc076cf743fb0e79b68cfc8ecd3c1bb1. 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/QZS672240464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14dca80e78884c1b98232f870edf7536f1a9cc98b41d96ce645122a36ce1c313. 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/QZS672268094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20db4f6997f5a9d866a819d91158830fa4dc465ab0c2e64039466f88ad69f093. 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/QZK6P2215406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d125b84746fed2d379a6a13c749110037263d2f068b9e5289d6a7cc29de349f. 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/QZK6P2215407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffe66cdcfcfe4b9199a561ba6e45ca7f6283c0d41924964f7b0a21a116f035db. 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/SE6XX2251517.