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 0x33ccf2817696617106c9aa0ee270446a32ee38e05401ac76280e69fbd918c9bc. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/66ef1b79-7232-430e-98fc-ef884d38ce5c.json and https://artists.proofprofile.net/proofs/artist/66ef1b79-7232-430e-98fc-ef884d38ce5c.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 0xd9ee05f8f1b18d58433bd7660f2828600403728d8192b99da820b827b3ba9e15. 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/PLUM72300688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43c0a53cdf4198d2b5016e5cebf7faee0cfd57fb37b41b1b254b5f7920ed46a4. 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/PLC062417666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc1f77289d9a212be0baa6d646e392e4508fb9094ec9af937e4fbe3681dbffe1. 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/PLC062411668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x866d928b9de596a527c782b99a4529291edebbadff67b99546c311573b63d0ed. 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/PLC062411747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f3f26494d10d74c1c6c81f1710e9cc61979a4e3a8576d196f77280b8e6074ec. 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/PLC062417668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa394417d2a0c2811e0d18af646bb05d2e3bd4cc49ed4622b9625dfd9dda39f42. 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/PLC062417669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45b145ea1257e5bed442082040801c374ae1954122a5ccdcdf6b7fd60d14b142. 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/PLC062417670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x866d928b9de596a527c782b99a4529291edebbadff67b99546c311573b63d0ed. 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/PLC062411747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc1f77289d9a212be0baa6d646e392e4508fb9094ec9af937e4fbe3681dbffe1. 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/PLC062411668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00762410f0adc2e79b91594335ad6998ab56fb01cf451edf493a50100a1f2bc3. 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/PLC062408063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a296b3088bea1eeb1a4bb8346194e4acb63671b022f71aa8ed5004210d1558a. 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/PLC062396321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94d2d857db6ad216306917b6c884466b240320ac9116b2906051d625ede40e49. Chain 2 (Bitcoin): anchored in block 957055 (2026-07-07T15:12:44Z), 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/PLF242210983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x807a62dec5fe47ebc0146aa7cb65d7ffe0989f93d0c4b749859778360837e43e. 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/PLF242210647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c6e1c57240f7ec267991f1f8765b17c87d555c6216a188cdf92b9e9954dbc88. 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/PLF242210501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa625fcb0f22618509044ce624e072fa81314b07ed2209b6d444bfa901fd70dd5. 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/PLF242210512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c6e1c57240f7ec267991f1f8765b17c87d555c6216a188cdf92b9e9954dbc88. 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/PLF242210501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f59c1182a34e991928dd7615b564ed795cad1ddded54a224d198af04f3e1964. 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/PLC062425728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb13f1c3ae8bcdcfb06b9710b71ecb086f5734ec6adb0a56168fe1a7e172c028d. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/PLC062439252.