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 0xf995e39b7a8563e19d64b136692ac23a2c3ec7ba7915adb6dd0f8bd8790f29da. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f7cf7780-6b82-4d3d-a8de-368b5eeab6cd.json and https://artists.proofprofile.net/proofs/artist/f7cf7780-6b82-4d3d-a8de-368b5eeab6cd.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 0x3a02c76c3ce3f9425ab7fcc86cd6ae4869c3d266c88d499d94fa98dc1f748dfa. 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/CH7812424149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc075be340c76fa32d15f094f83bc68a0fd1f2a497be01387e0e2efdec713f921. 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/CH7812425845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a02c76c3ce3f9425ab7fcc86cd6ae4869c3d266c88d499d94fa98dc1f748dfa. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/CH7812424149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fca4c2c37b1d2b2171b30e10670b31cd66295c4c95bb9cb8233ae27b03af3bc. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/CH7812527173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc24bd0591e0a753794db787b1a67e56a44a0e2ce1ae1ef29cdb666bdad3358c. 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/CH7812528808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fca4c2c37b1d2b2171b30e10670b31cd66295c4c95bb9cb8233ae27b03af3bc. 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/CH7812527173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc24bd0591e0a753794db787b1a67e56a44a0e2ce1ae1ef29cdb666bdad3358c. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/CH7812528808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedd65133a28c766e8c9dc5ce3133e05afbe7dc999f026bd5db7cb29560863715. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/CH7812532927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdce04c6489f5d8daf24dc8bdf22ba7054112eea274aa39ae0405d43ce2e890a4. 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/DETV91501778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x642e1e45c7f3817d90423f162e175ff47f3431870f95ec1c37f96a601b2b0253. 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/DETV91501782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xede1f4a821e42bddce5c60dc2b1e3a55eef65a1448c09e2cbf74ccfffc8944b6. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/DETV91501783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17211ab47c016a6f615a05cfefb1d14a46a7c2b29320c72c9d4f1b812a267fd6. 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/DETV91501787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d669ef10a20d28c2f9b6eeb9fb1ec6abc8fd4da8e74afee518e2c791fd90853. 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/DETV91501789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x220ba856c94f49292d150cfdc3b2db97a7729a9c3b5423a13f61b187f9c3232d. 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/DETV91501697.