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 0xe676112a5fb9a1765e6a205b408049033e92ed065d1290c320734bccc02e1507. 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/9582b83e-0998-45dc-bdb9-bb10bf75095b.json and https://artists.proofprofile.net/proofs/artist/9582b83e-0998-45dc-bdb9-bb10bf75095b.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 0x5aafcb4fe2e67113a8dea8c2e4049482f1c5a17c883ae7408a706030f9795a8c. 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/CA4KE9010262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x974779dbc64181a4b2336b48e34cb05d16d585f08de430cab599151c03439b44. 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/CA4KE9010265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a3e6d00128d08001f01d09080ed9564a1c19e74a768b85ac0705e17b7143d07. 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/CA4KE9010266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcab027ec82ee36501bcc9b20fe48c0980b97bc37f0acaced97bf9b2e8f7b5e5c. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/CA4KE9010270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58f4c062193d59d1af8d1a3f6dfd79b91527cca07d8eef777a776f7a1d21d43c. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/CA4KE9010274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa938c2643c0d1ebecd7e7cf75a39a8ce367c72edfdec216ea356f3c4a79ba128. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T02:22:40Z), 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/CA4KE0210775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4544bfe3fc512a575362112172ea5ad247399e814790e39ffcc8495c4865c4c8. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T03:54:38Z), 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/CA4KE0210776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fbf658ac81481646969b65c53d2a23cc49de9fa8b2ce130516ad31146f751ca. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/CA4KE0210778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3c29bf2aff071e03c5b7f65636d3ce7b36f4299096065013a50991384cb4245. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/CA4KE0210782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd27774bf9a3d7feba6fa4e847a2dd5ce315bd9c05bff3a9de60d24cc5db7e71a. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:55:28Z), 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/CA4KE0210784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x064c90f5a8326031cdf1d6b2da18c9698d0a97b2070de32a1a6c04cd0a0dbdd9. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/CA4KE0210787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42e6e9eb5cbbb19a9380fdde3675ec70ef47890e4ffbff34bb7152cf8f18bf28. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/CA4KE1410005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb69ce521c2123c0394331b7ecb5617f4bf56661f4b4172b21ecd1461d03651f. 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/CA4KE1310016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84da01187a332248a82ffe05eed4a736022a8a4c73d034591868246955cb1b66. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/CA4KE0610042.
Don't Turn Yer Back (On Desperate Times) : The John Peel Session
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12446fdd80553fac70b547d7761bef618ef19e57339c65b41b478599427e48a8. 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/US2B20407804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9f42c922e25702ef3c79a7d071d1774844db08d44d790f8d2890c3550bf3bdd. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T17:54:36Z), 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/CA4KE0910058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3299d67119da78afe16194949990156cb0ae722276c337fd0f165ac4b0e24534. 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/CA4KE1010015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7b1f0cf08d0919cee9162bb63885155020c3a6b795d3cd154a59515fe435223. 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/CA4KE1610011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x014bc5e76403f0bd61aea9eafd67528c5b347d891f5067abc4b5be49ec911216. 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/CA4KE1912305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed033f6461ef606b0e1272d76d5747bf41b4b0bb5500c7b8f3283e1743d794ef. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:56:25Z), 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/CA4KE2012401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac6fc716e5b8a4ad768902644a239715ff594bf73320df6e7aa9a6455aad1182. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USA560672247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x324a3c928fc7233145591eb2898daef96889f687d7119b38e7c03f22d5033bd6. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/GBWUL2063373.
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 0xd4cec70e1b2598cb5aa3188274a9f0632e8c78da8b4cf9a6bdc9346226a4be0a. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/USA560692982.