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 0x73fd585f64f12f16da4280b806bd896daecf1c9b6d44a3be7730d811fdd0efad. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fdc7891d-a686-437b-ac76-07f4d1c3ddd4.json and https://artists.proofprofile.net/proofs/artist/fdc7891d-a686-437b-ac76-07f4d1c3ddd4.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 0x4df0fce24d83b9a020ea03c2fa6e92a27eb50a13cc21a3d5850a868f16b7da81. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/RUAGT2438228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63a28a7c4fc08ff051467aa1c037dd653be6f9cad6ce3ce2584aa1258ab89bcf. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:22:57Z), 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/RUAGT2476314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95f520874ddc6bd07ce50ae76eff8f6525255ecd921694ae765b5b0117ae4219. 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/RUA1D2510181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a79c103874452dfd1664382fc31462eda7d5b41125d1fed8ec625f325e9aba1. 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/RUA1D2510183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9455268e87bb14ad6b5180709e2d0fa8f72650397d94ba5931f7a2e21d9b998. 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/RUA1D2510185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a67b76bb36cea5620a482bceab79b77fba18fa92e8a7ac5cdca7c20a342e1b5. 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/RUA1D2510187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e8a0c87ce9e37b5fa260b84aefba4264474c68add2528e95c21c49f46d0b4c8. 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/RUAGT2464614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8856cccfc7460f5dbf36bd82351961f1416c21d486bdaa2abc8ab2239892ba2d. 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/RUA1D2510189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2560308d07733fe53f1b0dd06b013eb455ce37e04d2831796e0a9aefd566a30. 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/RUA1D2510191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a36ea2fb93a4647bc5fc9c353c7e273898288cc8bf2afe4a7524b46cb9a246b. 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/RUA1D2510193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47ba164d76f501a62ba3ea96c4d11834bea8af9bfdcec759f8785342b06377ea. 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/RUA1D2510195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f6d42689c63e37927b7071c1109d81a82030c8625dc1400cc6acc6ca40540d6. 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/RUA1D2510197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22aed1d38da78e4d844cbf19731757ea0dc13dd26dde02d0b630e5e62470612f. 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/RUA1D2510199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf978ee9dc28e37ca9fdfc592be8d2cc05ca9b802b7b92e9be0c17c27550a42c. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/RUAGT2582539.