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 0x8a7c204111ffd0f03803a26aa905a9e6b04219e9b8d18d23e4d9682b0beba1f7. 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/698f9dac-0fb4-490d-ae4e-e2671f3d29ef.json and https://artists.proofprofile.net/proofs/artist/698f9dac-0fb4-490d-ae4e-e2671f3d29ef.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 0xd9c042480fe2d825ef1ff4de0f0e3a32082d4fa7d12a0612508f8a37d4031676. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/TCAED1954843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3fa0bc5b24c26405757569dc002b6284d92bf3fd89b43ff809a1eaf5c97583f. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/TCAEK1970630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a322a04baa1066417040b5cad8cb075cfa6f845297aa3bf19ca3a845b9d142e. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/TCAEK1970644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16af5a0467d3d595eaa5fa14ee77f2c4c62c814d0e2fe3481b522e5b01d2adc6. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/TCAEK1970657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cd6b14b2d13fd35b67f4ed6eec34f80e9d2d168a128dc6ee4979759248063c9. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/TCAEK1970665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe09f0c2089186e44c261a391072c08faa8c28c48e0d3422742dee28fd8feb30d. Chain 2 (Bitcoin): anchored in block 957695 (2026-07-12T11:16:12Z), 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/TCAEK1970688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea92da46d606c6a8a60f73d4c3b6e7c2c1009dd57e27e0de6aa667367506dacc. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/TCAEK1970690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x860d59e4b47a0b56fcf7eb82d35018b61d72f634467cb6ce688421f849926e7b. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/TCAEK1970700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde0e2debed83d3cc8547cedf667e2c8f79026d06de62c8dbf154aa8fde67a792. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:03:28Z), 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/TCAEK1970704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27c7ee3ac91db9633b5a0bf903d51d5f92917b23830e6c5dab952403f2e5df1c. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/TCAEK1970711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x989041a7ffbc393dccaabfd809c5d764eb6ac7748f55f414d06d67abc43cc7a6. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T02:34:19Z), 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/TCAEQ2079540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x125a7960d40ad06d4a023236c74f5ef7c4c2b5b4574ce8b306a1cce554fa72c4. Chain 2 (Bitcoin): anchored in block 957699 (2026-07-12T11:51:06Z), 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/TCAFD2018403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2aeb4e5182f12bf66ad788c157e69120b091ae57464e5cb98f4835b50a9e26a4. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/QZTBC2556603.