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 0xcdc5cb99a55a3a390d23f2ef21d34ac259bf3506eac126314c70cc1c36019125. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3b248b88-d11b-4ea4-9752-20afe92a6230.json and https://artists.proofprofile.net/proofs/artist/3b248b88-d11b-4ea4-9752-20afe92a6230.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 0x504e84444351cb96a419d0c2d522e31d4541c19ed0b8ac51cd24c6aaa58c8c27. 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/JPZ921613765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47b491764cfba0256d0134d72d47a8d3b479b767b51c90ffb67c6238e27c9d23. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/JPZ921613777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3095c612d21b06dd71dcc9027f40d5db8b004579d8d921673cd18b8943a821d. 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/JPZ921613779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x982fcf055a37d19d5b01773a2e92e68ecd50523d72e8ca7c17be241a84e4fc8a. 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/JPZ921613783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44916aa5e252d7b5b39e136634b0f0e8754d82bc7b31b0174a89f9f3af34b3e0. 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/JPZ921613784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaba43f29c1f13023f6a2fb10d0ec6d1b8531e7531bff56dc380c48a5242336a3. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/JPZ921613778.
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 0x38fad5725a4ea98d24eefbd141627634e9e7643b10b4404dfffb98886359b6af. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/JPZ921613780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x308e306a1440371fa0cf887add1b5b8e5fa3148019a8d2f9fba989caa849acb4. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/JPZ921613782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7aaeb09e891f27082b3fc6b972e9d258eaba4b00d3c47c1fb513484ff2f29d9. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/JPZ921613785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64ca8844d2bc264a11be28ff9ab7710cacb47642d722062047a23cc7b0185a8d. 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/JPZ921902978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8160319d6a5d794f8eea277add5ffab10ab7bf74ff7d9b827c0ce4b677138660. 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/JPZ921902979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e87fb7f1e344e43781cfc180467bb6dd29a20c77fc3265da1e0bbf481ac4bc8. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T19:09:41Z), 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/JPZ921902976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0c1c81ac7a19d3b4275aaf5f87577ea8a21af50f2ceffe7d436c907cd575e34. 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/JPZ921902977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18c71d3f636c8acf5f52b97256e72c7cd89c313042462784f29c2017094bf001. Chain 2 (Bitcoin): anchored in block 957304 (2026-07-09T12:19:34Z), 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/JPZ921805140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7684eabb7ad7bf5031c1423055bc7202eac3b7f7392ba8bd74d2d822fd10593. 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/JPZ921805141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfab15d1c0e0679a97a8dfb57bc7a017dc7857f8f7d7263d469c27b6f417746db. 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/JPZ921805142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6476b52947966c3c88daa74d2a63a82c80571f3a075550072f4804013ee56004. 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/JPZ921805143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8b76ee69dd57ff34b601e0ac9e0f4fdf950c98464e8c2fc76c6300ac46dc95d. 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/JPZ921708979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x064fb1a98b52135061e368f167537c1997fe237764d16778a5f71840d65172ec. 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/JPZ921708980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c12ffdd8b89dadf44011fe880bc0430112b04bd557d840c98922940a7298d78. 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/JPZ921708981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8893642d99c33543a1f5377008c5f9fdd73c0ff5d6803e2bb23cb5c03cf627fe. 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/JPZ921610541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x891ddc43cf1b00772b5af549e145771b8fade94b4b864231e6594828d9a7a677. 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/JPZ921604677.