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 0x4942a31f09bba4c837553478561f1f06f90fac69b9cced4cdb186afd1943c114. Chain 2 (Bitcoin): anchored in block 953786 (2026-06-15T12:56:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d8238659-5d06-4d1e-b250-edf680757f00.json and https://artists.proofprofile.net/proofs/artist/d8238659-5d06-4d1e-b250-edf680757f00.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 0x6face15e0f858ba53a1da8340b6e96226cf5d65a89b74fc11c24e7b42f8f71ed. 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/MXD781901743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ba4efea03817e0d8ab2b81e18689330c84b0bde1690959fb73654124ff01d48. 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/MXD781901744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7217c08a5c6b92a35ae869c4bc5dc1523abae28e15b88706bd17c2d1c508a15. 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/MXD781901752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x498de336f42f1d71f8cce52e52d84b32e441817e91e068db700b3d90495e4d24. 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/MXD781901753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14fc94c3738166076b0397f7021297b2958265d3b07a690a49987e52297d252b. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/MXD781901745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa693279886ef8794bf9857116ae5679dc4894601b76ed7e5e2aa69ddc36c0f39. 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/MXD781901746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x597b782518947ac1d5e61d1178150c9fe5e8146b8435e0d0b995374f39f4f827. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/MXD781901748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15bac61313f7372b1366e4c6e288784ee7ba114f3e714101c3233d111e017e03. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/MXD781901750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8734962f251aa2c7b436e5935ee476f6a7ffd2aeda325697d8b9d454e939bbda. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/MXD781901751.
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 0x03893966ed2fe7d3f98e8528e4dd6509821b904d76d61a34bcce8228940bf9a0. Chain 2 (Bitcoin): anchored in block 960349 (2026-07-31T05:23:41Z), 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/MXD781901754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f25f6cef3502d9a0168cd7b1c78769cf83412b5a9bd2c968b008e2a35f7fc4c. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/MXD781901747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e63a2e04d37ef55cad9833d0ab9ebff5b4ead532fcec1fe7064007c40a0b6ab. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/MXD781901749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd38bf75e9c5766c24b266a916df3e2c5f7b84ba37b40d0dd5ca581ffaadc66a5. 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/AEA0D1981624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa08be654e14385842a47e5f87a665b84d767bd335de7e5a09ed1091c82e039b1. 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/AEA0D1980624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5cfc42fa589c5b25402c24f33b61687178aa0892b441a1badda4a1dcdcf7a44. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/AEA0D1980855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fe47d37b01801761ed42d2f06ac5016ab3d79d2f4281e387f1cc6c8543f2e94. 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/AEA0D1901994.