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 0xadfbc4f2d2966b18742e66b10729bdbdf1fcc5d21603ed384ba32d2766783add. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/da5db6cf-2e51-4564-be24-e97e1893eb05.json and https://artists.proofprofile.net/proofs/artist/da5db6cf-2e51-4564-be24-e97e1893eb05.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 0x7e3f757b91a86e955477b4626f35b6d245b3f3f6a9eb06654cca041a94aa67da. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZMEQ2218422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11bd3e768d1c896207641a7588521e5a562c49d5f85b7863dc553519dd0ab943. 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/QZMEQ2218423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08d0d02c3aa38edcbe6651d6ee40b0caf66eaa5624826f2fbf9cfddbf4061beb. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/QZMEQ2218424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa11a2d34ae273d600c27a0f4ad3a96f39e341c3fc52dffac593d4edd1b8c18e. 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/QZMEQ2218425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81a9326523bf7688a509cf56904a1563a04271a59f8055c09b82032dadbd3fe0. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZMEQ2218426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51c792b3311854cda734425e85633617146c6cd4d1cf55f09ca56821c3b1c249. 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/QZMEQ2218427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc05affd61d4ed283f1be43225a80a54458ee42500cb3381c3387c37a206e5c06. 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/QZMEQ2218428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc13fc116c0ec70f5b1771dd8e190835aa4dce13222ec2a556482ede923d3c26. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZMEQ2218429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedf63241d2adf1da627db2e76a99c978d60bc3a91e08544518df7b89100128b8. 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/QZMEQ2218430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbe3e74cf46603a9f3848de470b015dc81c4d467a14c29aa6e8d6408ccf585aa. 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/QZMEQ2218431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4a949677e228d7b6f32521e678782c0875f5ceb24c06b65325b17c7ce462b27. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZMEQ2218432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36c30fe58c68beaa90e7cb275202d2e9c4051beb88f5606e53229df599143e1d. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZMEQ2218433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x226a48eb4364f6b37108c5ca6111ddc68f1491e7c03ccd7174a4d2386e06196a. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:29:08Z), 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/QZTB52259088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1d6684d10a76d606060d613307b61a30fdbda2682bbb7cd2a4ca9b0ebb4033a. Chain 2 (Bitcoin): anchored in block 957805 (2026-07-13T04:34:37Z), 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/QZTB52259089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91935fdd9372253b556dab3626c7d37e35d2140303ae2ade3925b82a4f2df3fd. Chain 2 (Bitcoin): anchored in block 957892 (2026-07-13T18:21:16Z), 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/QZTB52259097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd111b7f358e0555100b4f12fde0515e4b42c0bbd281648368feeb9131e6487c. Chain 2 (Bitcoin): anchored in block 957884 (2026-07-13T16:55:06Z), 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/QZDA62513685.