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 0xc2ad49927a285919282c4d7a7fbb3485a771d6c251bdc6340ed6732c271666b2. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4228c716-6bc4-46d6-95f2-ec3a6d3c6ccf.json and https://artists.proofprofile.net/proofs/artist/4228c716-6bc4-46d6-95f2-ec3a6d3c6ccf.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 0x665cde8595f3c0c9db648dcc27cb82820c5165f7d18124ee94c766767bef15fd. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/BRP5Z0800003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cfecbe94aba4134f06401c6f955ae7c07270d43ce4ef9e6635676a33f7f99b1. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BRP5Z0800007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x041156472d4c63e4e047b123755220d816661750b80e57e458a3f23153a9d4d1. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/BRP5Z0800006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21b1e8e85082959fddbd36abba86359f8378a54f80c805088490889bda2e47ae. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/BRP5Z0800008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x118a3d3eda336306f28e6ab4f64b2b5700c766b937aa18fa45fa2ede2ebb4dd0. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/BRP5Z0800011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bc29952826880c17b0eb94f127714a94df2f5e636d509d3ccf5f075e7d23018. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/BRP5Z0800013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7d143a4974e7ad7ec74203e36fc294c90d90f92789830fef86fd9d3992669ed. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/BRP5Z0800015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e822c8edf5a6c085aaf84d0728024122e5a2b0cb6f1f65c6d6b46c0f2e855ba. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BRP5Z0800016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbfa402a08f42104b8d62525dcf905ea60881b60a2eb4f98517bf20da2b5e9e9. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/BRP5Z0800018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65f452b06e1278b824d021d5c29ccc4add111fa9a467edb0420a289106baf424. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T08:10:49Z), 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/BRP5Z0800004.
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 0x9631d5c7b93c22cbd32c583b6c0d27c40ce2eec67f59b06814dd49ebf0615cfb. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/BRP5Z0800001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6736bcc2b33798c8e46675733719410f4b93113ca0e5772036e05c78c0097483. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/BRP5Z0800005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a36dfadcb2dff27895702249bae528d3643c0a3fabe636bcf5cfdbdd8b08b42. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/BRP5Z0800009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe227e324398904bc97244433b578cefe5e38c0f74f1f73241030220c6cf68d69. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/BRP5Z0800010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91d98724b617ea4d14cb0c51d8133928691e927c8937868fdc054e17d65ed8d4. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/BRP5Z0800012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x621a90376589664ca589e426411748ffcc81a0837da143c855c7ee89b774cbf6. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/BRP5Z0800014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71ca29a76efe2e6de524c85a775d04824adbca735bfff69f88f4bb1bc68ceeef. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/BRP5Z0800017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x961cdb2f70eee7ed7b0e190374d0de029cf047851e59fae72beed2cd41a61864. 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/FR6V81766657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73e0d7281f1cb89166416b2902d8008de9d3f734cb2454f180b9a9d2b2ad5450. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/FR6V81766661.