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 0xb4d76999bbe983fdfb221dd4d148857111dbc9f08406d207253f911f955ea234. 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/93102c95-802e-4c4a-931b-28b6ce891ec4.json and https://artists.proofprofile.net/proofs/artist/93102c95-802e-4c4a-931b-28b6ce891ec4.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 0xe2a78ecd22784af63f0ee3f9cb60f52f87ef3adb69c7bbf602b872638fdf390c. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GX7852400358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd42a63562392022eebfae894d751da7a91c66f0f1055e0020409753cfa780bf. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GX7852200864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85ffef79f49510973c63c74488b32c18ef11e7e6c848d84087c93275871bd4f3. 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/GX7852200295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfef5a92f74961dbf1caa62b82f7a5f5ad86b162cc7a0d3bdfd1a43a771cea7f5. 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/GX7852200200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54ad3bf15300411d6b7da96ff431a7732c67bee2813982de17cb2020ea88b657. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/GX7852200168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dfb0e0ea36815873ff728c1772c8bbf97b90d38271fcdff4d2d9496800e9a8d. Chain 2 (Bitcoin): anchored in block 960225 (2026-07-30T08:04:30Z), 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/GX7852200129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3913d5bbc23e5a14d5d8c1eb0976f17652a165af5699d9fc1cedbc900b5c373. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/GX7852200074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfed99c03e4c6fcb9a230901fbee7827ce3620a7a9223a046a0b51d804d08773. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/ALA092100155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dcbda8445a0840752cd1bca5e02d395fa42121a97d81547824866e1b61ff46b. 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/ALA092100089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8dccd7f54e78085ef24fdeeccce900a4dd0ef9b78aa6f39f1e698dd098f6839. 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/FRX872104579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdc581cdc2937366078a524218fe0d4a5c5e5612a257d373535fd13d7af984ea. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/ALA092100064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95f3a60baf5c5de73064e7cd011b629ae78bc2f8176fb943aea0faf177c6e47a. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/ALA092100013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c5227985424ded8e01d80274117d8a8e2422ff71966e6c9db6b15affd2e85a9. 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/ALA092000251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0468b37969b3a1247e0c8312f6db7eb34f7c790c98ec1c0d88b520807772c9af. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/ALA092000203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2565895454e66b12ff537f03afae07ef0bfce9fc737b3016ee170205c56210bd. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DETB81900005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8dccd7f54e78085ef24fdeeccce900a4dd0ef9b78aa6f39f1e698dd098f6839. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FRX872104579.