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 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 0x393b6d2dc18e1735d3feee69c5250b38987db21e8f084ddae4dcd35a18bf1810. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4b804892-daf1-457b-8dfc-308d166b1409.json and https://artists.proofprofile.net/proofs/artist/4b804892-daf1-457b-8dfc-308d166b1409.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 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 0x1f09882bc1dc06f04436a192d210710b5f552e3080106f85a4494e1f4ecf0deb. 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/GX3FQ2400601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad1b447f406939478b6a83b90c6f48a5f513c11f25caf7b9a53e6a987096aa73. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T00:52:19Z), 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/GX3FQ2401108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2797495ff2c27bfa3446bff5b8ea02905a1e040738382ff05f7e9b4f360d6e09. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/GX3FQ2401109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf600d622727581e8d948dfaa89a692e416dd55992dadc37b635950bc7e04437b. 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/GX3FQ2401110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa216b7db58aa9d9ade0217d65703e1b9ad60d93b4c3554f463d46f6e4128be74. 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/GX3FQ2401202.
jet-star - on-dré's alternative essex loopism re-edit
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb23c139b70f574571bff4ce1c10afd7b1422c09e3986c7c0d47234430625b245. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/GX3FQ2401204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b865f627193fa36b4dcb7891ca0995c10312f13bd42aac1bc6f27303685db60. Chain 2 (Bitcoin): anchored in block 958889 (2026-07-20T13:24:39Z), 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/GX3FQ2401701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ff3069d414024f0340f0de9f1db96f02249d73e7f95dfb19d38986d7f2395f8. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T09:11:53Z), 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/GX3FQ2401702.
psycho - on-dré's pee​-​ann​-​oh re-edit
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0c0fea43fd6f87c20992c9982182752b3d7a160ed8c4876687313c412313f09. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T08:14:15Z), 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/GX3FQ2401703.
psycho - michael gray's annihilating re-edit
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa124d19073d7a65545121d615131438e7c3052759a2f8493d0c242c4a9d2b9a8. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/GX3FQ2401704.
psycho - michael gray's nightmare's revenge re-edit
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16a84c32cc5a0b3c8d06998564109cbda9ace2b9b751200f8497690105268f09. Chain 2 (Bitcoin): anchored in block 957866 (2026-07-13T14:54:25Z), 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/GX3FQ2401705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe35ab1781c0a8b8ee29edf5b4b1c7c8f37351fcc45b259b0351f0fe5968a7243. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/GX3FQ2402402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09c1ddca4ed3c5a620ac3d6edd8aed075f56432db8b0cdc4989565935315a14c. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/GX3FQ2402901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58ab6b4db87b8ad348fc9951c2b2f0594f7648e6b0f71bef4d6be61b52c7c16b. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T21:34:21Z), 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/GX3FQ2402902.