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 0x37d3333306ffe7bd2f2121cde14249333bebccffb9f209c72771c6b3de4f656e. Chain 2 (Bitcoin): anchored in block 953759 (2026-06-15T08:04:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b488fa03-32ae-41da-8fb0-647dfafec185.json and https://artists.proofprofile.net/proofs/artist/b488fa03-32ae-41da-8fb0-647dfafec185.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 0x17d6adeab26d8556e46aa76247fdf9808c3d6b4d930308699d557e2cc1a7c5c0. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZTBC2552191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd6281579cf375bc91d23c4741f3efcf5eabf5708bb57b215132c1b88652d9b0. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZTBC2552192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae954d9cd9cc2d4bb74cebf252dcc4e64a1ad6510b7be0cad264579c62f4742a. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/QZTBC2552193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87203ffa2619c303e7d1347cdbbc19aac7b4776257c6be15787b2e7f18221e16. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZTBC2552194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4dec7ac64d0ae62e5cfa5d96120d16963dac1dcf481d14152284670ce2544c5. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZTBC2552195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e731fd7c67ef5beb84583b9e47b44b28afe0bbb4fdb06f84a1f85c558f7b766. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T02:19:30Z), 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/QZTBC2552196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4910482cf3f47a8929e2eccfdaac452a28d1c6cfac163d16dd161f4c0ad85b02. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T10:49:01Z), 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/QZTBC2552197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x055e5e91d7bcce78c0ffdcf84d1b22a00b733c6ea157e8e0f43fef6a32cd45f3. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZTBC2552198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6c929b112cfb375d1e0dd4287f2a55e49bd193496e2a57502c3b894485a4c4a. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZTBC2552199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75df6285527cb34104efb05c9d085a6b2e185dfb98b6e024f42048aa27ea1a73. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:42:19Z), 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/QZTBC2552200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7173ce2df6bd741f59cf732ad6523fb58da19849d4a249f2cb3e2764ec5e5f3. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:59:20Z), 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/QZTBC2552201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x995eb056f52abab74473f3bad49bb9e57b22370e6a4fcabcef2ee03d44492113. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:38:44Z), 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/QZTBC2552202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69cdd8d86513b6883f4848c3633d701bf7cdc39208f2cc7cc89dd0ee3ef161ec. 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/QZTBC2552203.