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 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 0x177610d4561f552217e9eae5e9e312fb05ad1b88242fb0bf84b6095eb0a82e22. 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/8a0ed446-98d0-411a-96da-da6001fd68e9.json and https://artists.proofprofile.net/proofs/artist/8a0ed446-98d0-411a-96da-da6001fd68e9.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 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 0xf4ca43463d3af153b8efd2b0cca1e13320cd84bb848976fccb6a21fcb28ac1db. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/FI2M81500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16f6e67e40fe4d3ccf5c0db54535c16cad96027d92f6fbfb62e6c24c313556a2. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/FI2M81500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f8ed8c50862b9967de453db391bbc68092d7deca449b0808a5386c3e959c1d4. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/FI2M81500006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0a4a9926aa45a5aee7820bc39cebdbcb173c18e7ab17671143160e9941c6b68. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/FI2M81500007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51de84cbd2fa5f348e7cae6feb7b38702e2a6c683f75e43e0c481bfc37b241c3. Chain 2 (Bitcoin): anchored in block 958627 (2026-07-18T23:33:54Z), 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/FI2M81500009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c2b8a494072b3360697317b44039099bc26eff58e6569aa6b2ca3d1f6a632b6. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/FI2M81600061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb03f1e7b3e6648f5ddc85ed5931811fe6a23b45aedebf51290c88d23510c8429. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/FI2M81600062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe536ccc6d9c709aa7fd6fe4868719e972682832324bebfa31519521e3fd823e. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/FI2M81600064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe481fbef0f97e4fbdc0591c3962dc1b2507c27a4a85a32980b7370cb2fb97045. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/FI2M81600066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05a44dc639f0d6261e295bf84604de487865f7ac0d47eb07006c8b683ae3136e. 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/FI2M81600067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e2f72da01e97ee977bdd18db11619c4fe976b219737fcd9a27bf78dba6245de. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/FI2M81600070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3447313546630830a4f4572f3f56f9562a7aab68b972c10c5cc186aa7cd97d1. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/FIOMR1800005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8932e2dd3d1036459d26ee41f7ffc991d8a10e9e1d2e41df97d2dc238d1fff38. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/FIOMR1800006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09fd53f26b179134421ba7fe78fa9b59b3caf8b0387afe97720de8cdc0eb5023. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T20:03:27Z), 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/FIOMR1800008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e4a4acbd6a2b66f4605b3571738f7582b4de5db71b017ed3ac56cbc0492c566. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/FIOMR1800010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa43b65707ab058f3f7b9a0f6a1be3fb7dcaed4ddbefa15359fa2d018e7a03e05. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/FIOMR2100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d2eab73549b70bf9f26220f3d9776c3544d3c9392dd6326f0809f6e8eb2ec5e. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/FIOMR2100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8c7ac7d055b3c70c66cf4517d028faafb288311558d5acbcb8ad85f34c66f2c. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/FIOMR2300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39ce60c65fc8851e957495425e5203202353f94936a59effe3a4c8b00c104602. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/FIOMR2300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7adcb146e89e088a338f4ad6edfa6db69609d5e0686c97fba968afac4b9d3042. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/FIOMR2300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x820e25f4131941e305997cf4726873a013e2ca24b625fc38ac0d9f8161c5521f. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/FIOMR2300008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0252233355b3665850926e6eabb4d80905060414f9cae3e3733c48cb7915d715. 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/FIOMR2300010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7819a7c6598c65cba63a510c176948088a108ac2a9e0fbc436505db9c4721c07. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/FIOMR2300022.