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 0x62a2dc6028f4a556885d9b05280605e10b2169558825d2d5bf9a8f0d75b41bc2. 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/63891cf1-d92a-49f9-8af0-8703d9aef2c7.json and https://artists.proofprofile.net/proofs/artist/63891cf1-d92a-49f9-8af0-8703d9aef2c7.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 0x97e7e65739bb8f43fcb53aefd1971565bfa3bdf458e35454f6fa189e6ed04eba. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/HUMAG9600157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbd85c1b7b80c18f1866901f6e21b3b78e73d2e619b1ca32a620278e04ea3f92. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/HUMAG9600159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b780e8cc495805755594dcb47f231e920111f63b3cfa6ea487a3eb9b25964ae. 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/HUMAG9600160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8469019c283a4686a2ce0601fcf52ccfb24b03bf7af97196b0b7986e48e1cd3. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/HUMAG9600161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c963427f9b63c2a7848f6af15a4f071393223673b2d012cfdbfc043a070d7a2. 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/HUMAG2002183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x892cf71a378f6c71b49811deee7803a9b3749bd593cfbfee56c58a5c4d92ab30. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T01:53:28Z), 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/HUMAG2002185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18b55ee5788588df27aba45fa8abbbb220b359c48da890a762f47395207734d2. 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/HUMAG2002186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x465ac79b1f193e5831c6cc40fa8412eb290944ac8636247b30ab3256776f4d2e. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T15:58:54Z), 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/HUMAG2002191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ff0e047c367f568492d480625c5981aa6bc544d7e26028d5541af0c0a9f5106. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/HUMAG2002192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcdd2cf564453692340a74879ae18cabefdb87366db9442916c408e48dbb5d4d. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T18:57:34Z), 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/HUMAG2002193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ed39962005b9b6468b22807d80c9b404fbd12d6b0e8a22427bf3e6c8517330b. 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/HUMAG2002194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5621dd8907ea5587d4b069877bc44a9d11a3e35d81d81ab0cf6d0c5f0fa5fe56. 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/HUMAG2002200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14ff580f23bf8bb12fee5e65ebb7904e897a6d4440e4f50540dc61def9d52062. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/HUMAG2002205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x189f24ae7c11af9a09eb4ba24a9960adaa5657b5b8f4bd609b5d35813db8ab00. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/HUMAG2007167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcad4a198b858fcf5b0c104971d0a10cc1fa1f96b8684d43e30720cffce6c5cc. 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/HUA320900050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x067111f434aa289fdec4deb78a265d6b19250f0907c0997bdb19ef680d19f7cc. 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/HUA320900061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5acabb40dbbb2c37723369fe0457ba5190afb2b63ba8f8798d1880ed5c0227d9. Chain 2 (Bitcoin): anchored in block 960187 (2026-07-30T01:34:28Z), 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/QMFMG1303923.
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