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 0xbb35f02de590abee9067a92c94b0103bb03d75db7f126562b5bae31cb9a81810. 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/dbf22e4b-2de8-4689-bb67-31f93a9dea76.json and https://artists.proofprofile.net/proofs/artist/dbf22e4b-2de8-4689-bb67-31f93a9dea76.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 0x85d8f69d95934129108e7385851efe7ba26290059e3e68843eee5d7ac6263f4e. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:55:48Z), 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/AR2WU1500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd21c6cf0d9718115c0daef4e09439f13c37b7db6bdc12b3f6f0643f25903e623. 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/AR2WU1700002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2081977a2cd45066e6e754e1789b27af32cb358052c9bd819ef39787e5e76425. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/AR2WU1700003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6059d7aeb09f00931e85faf7153cef93b620ceb64d6872fbdade02306cd52325. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T17:59:23Z), 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/AR2WU1700007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf257a84b7235db897be3944811528408b515199a0eafd021a5b3e03ee86312b5. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/ARRO92000006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f741a69f83a9716eca01b72189b16859b2b809c5dd8fbcdd29032d75ba1a933. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/ARRO92000011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf973d3dbd85ed49e8b2ede97a9d8f571c056082eabc8d2d9b7b9d46cf50cffea. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T13:50:56Z), 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/ARRO92100232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb82f2cc710142046817bbea36abd397c49bb0c23110d4c9e25ff41e47ad49e0. 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/ARRO92100249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95baf71c49d38495226b374de411aede4044359471d9ac5fa09ec3c83cd5e391. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/ARR092200283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd43d0cfc9b1298867f874b847202c230e5c824588e922cebee8ae3ba97afad13. 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/ARRO92400482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ba48052260eef8dfadb7eff1aa40656bfbb996332573dee132a023f7a23c3f2. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/ARRO92400452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44dd8f57628725b15c599295cf971521bcb3a376b8b85503a7ff4ddd4ec2c1fb. Chain 2 (Bitcoin): anchored in block 956485 (2026-07-03T10:53:04Z), 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/ARRO92400512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95baf71c49d38495226b374de411aede4044359471d9ac5fa09ec3c83cd5e391. Chain 2 (Bitcoin): anchored in block 957834 (2026-07-13T09:42:16Z), 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/ARR092200283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d02f1763fba588ccc73e3db0c3ee8c21ba6051568ae1ea176244fbbccc45d22. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/ARR092200277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ec8dccaf5c3819294aa0770beacad84185336c4d7cd1cb67ee4703a55091759. 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/FR9Z62300204.