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 0xe03a703dc29554532e475e0ee60ff2d5c9b8016120ca8ab4c03cf2a2b6640083. 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/25c62668-7bde-4c0b-891c-5b79264055c0.json and https://artists.proofprofile.net/proofs/artist/25c62668-7bde-4c0b-891c-5b79264055c0.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 0x7a243786c2126b881c2c893ae1e8ccca3735808498405894964e5068a268f576. 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/QZMZ92435250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf00bb772a988136f321c6a1c815453b5272e98cd0dd1aac1d53ce53d2f63cf10. 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/BK2242400935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1a14ce26f12b4d8fdc5ef73e72fad61862d51042c0cb6b64890bd90e61a6136. 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/BC3PG2400479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbe7556bf770476aec1b630841607faf7c6148e41e68af6406e8d359531c9206. 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/BK2242400264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0ebdede830a8d10bfb87bc2495383700e0ec0a441d618c64879b1f04815f8a6. 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/BK2242400233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x797d91dda79ea51a378dcf39faac38c2859458f2853614941bccec7244316752. 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/QZNJV2415514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb87a6ae87b8b2ee35a752a5e2df7933fac3e2b088e07599ba634acfb36cdb99a. 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/BC3PG2401527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e33d57bfb44acd42d28fc27a251aec1a882a99ca55890070f3ecd406d637046. 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/BC3PG2331368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b8a49fdf40d9140dcf46979ac418e2cb1cf42f1cf61c390cc3da396ccc774c5. 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/BC3PG2331056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c9fed6a3287d7c46968e6f1f47f2f5dfbebfbee6bd1c323393e4ca12032ef06. 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/BC3PG2331054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70ad144e120f1ac6eee5c73d71fb6418e87376d372bb0bbf3fd65130afef3561. 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/BC3PG2330866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86dfcdb102fc5f79ae96190441726cd68d78f761ca38702f59178910ebf140bf. 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/BC3PG2330881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5aff4c6048ac1147a3f490b458158888414f6573f13640b425e8477d493ac2cb. 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/BC3PG2306897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a47b28bfa4bbbf4fcdbe08f5bb1db49c25bb9c34052546b0de46397b08012fa. 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/BC3PG2305443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e8a85ad72afea1531517ebde9721a03de96b15c25958ceb2274d3fabe2961a0. 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/BC3PG2402285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa98152502c14be5af7fbe71703eaceda9a082e39db14526402977e253e950cc6. 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/BKDKM2400045.