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 0xad326190d8d437e25a890e72356d152d9ba1ffe59076d4669e57e865f3a83d60. Chain 2 (Bitcoin): anchored in block 953758 (2026-06-15T07:48:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b4c2f2f0-2296-4108-a4ad-3f47c57982b6.json and https://artists.proofprofile.net/proofs/artist/b4c2f2f0-2296-4108-a4ad-3f47c57982b6.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 0x691745cb7437f622c0ea0fac6db4e1dc90479e8f55787d002b7103d44de01bde. 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/FR2MX2400380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8cfe35280c4dcca6af1ba462f9decea6bd3d635bea6f12a0b763fd14fae605b. 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/FR2MX2400410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4d0123e2f7f286c2e2481fdf3383760dfa745c4b2bd9d7c4c9fa2fd10dcec96. 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/FR2MX2400120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf21dd92d325aaaa43ad259d00390e7e0ce83a8d0bc2eb51cdd442dd35a96ff8. 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/FR2MX2400090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1322bd518610f48738324fa218a12b2436f672939fe4c951aadd3c3740e6e4e2. 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/FR2MX2400040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa119dc7c167577d95c0d3ca493d50654a9c4f7a8f812f340f18f2657e2c9677d. 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/FR2MX2300390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7214a003083ff4824f6eb6d8a2b6797bdff94c6469723be61cf187fdf104816. 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/QZK6L2279933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa119dc7c167577d95c0d3ca493d50654a9c4f7a8f812f340f18f2657e2c9677d. 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/FR2MX2300390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf73755294d139185190bf5684c1ba09c63d364ed5b493d8e33d5b95891cac4a5. 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/TCAGR2291869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x898f8158e7321d11aac4b54bb25222e1813163386699689cddafc32108cdb4d9. 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/FR2MX2400590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x107ae6ef2fcc30ffb6745bfc10e1c4b99a6165de6716595cfc752138d543f587. 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/FRR642401503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x597b9542565ede6645257d3e540a7cb4293f343973530d75f2bd54db88196c87. 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/FRR642401061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c59b3f55e084109064a429b3344d2f4f44a2a917a2072bd98c867953d25b62f. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/FRR642401505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd00af4cbdfaf08775b7de25a6ab1647ca36101f064e2266534dcb7bed5047e4d. 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/FRR642401059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0358318aec38b21cfde2d802a081e31861e88ca58cbe070458f20da0c8aeb211. 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/FRR642401509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60441c0162c21b2af1e5aa42d8f750001062438841cdf429a4ea7c42a48ba924. Chain 2 (Bitcoin): anchored in block 958042 (2026-07-14T18:24:07Z), 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/FR2MX2400540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ff5e09d87d8b7f0d840476339e940a5e67434db252fb75fbe1383808ffb9baf. 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/FR2MX2400770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1e6d748d66a8c00570565ae5a9282996b38390f50b646bc9de3ae38a385609b. 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/FR2MX2400180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd434294b09184bdd57b0cd8fe8383d9925222612fa922117cb8e7adca5cbff5. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/FR2MX2400190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdca27996d93b28918f3ffe1eaf98e950139d07439dac4e149825636206ac6e6. 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/QZTBE2588863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60754322b4814281ad85c1e48c0c324ec1b2ebbd0eb8b0a57b8764caa47a7bd4. 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/FR2MX2500290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabf45613ae5dac58a40587fabde9064091f6b4800ea3c8b15418a8c242ee9327. 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/FR2MX2300200.