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 0x6e3184c12f2c726da2835d8d5b05b16d65cce59174a67a2e5f18c78ebc0da79f. 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/c0137d7b-b574-4be6-92fb-affda885c5d1.json and https://artists.proofprofile.net/proofs/artist/c0137d7b-b574-4be6-92fb-affda885c5d1.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 0x923410c8b056771fabe1f6341c120cd15d4e097147d5eaa7d6c2d00c0b96dc7a. 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/US23A1501585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0d74e6b55326dd2fda9c1d3227233c718a9eee9f4c892713bfda136fe608f45. 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/US23A1501586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9a6474d16482772cea267707a591c93bb584fdda60478d862a58f579b3015d8. 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/US23A1501587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5260c0b1f174477a7a727a6e1952f11560d117c3e12404c1276bfc1cf55b0957. 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/US23A1501588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe82188b0b9e8d2a4b7313717c0e7625807dadc11126e4c302fca6f40867ba58a. 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/US23A1501589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2ac6fc64a706aebc5c47fb3870a6ca4b21a0d7eb7ed457e292c82d83e146e54. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/US23A1501590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff960aaa58d5aef034c09a476bc70dbb7ee5b0326b163d958afa1b5cc50bd912. 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/US23A1501591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c4d8a8215d923d79652ed6096cba94bd6e2ce83e1759e48a9e578cfcf581818. 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/US23A1501592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa703c5e11bffcd54d38a5f8fe2ab9bea47bb2361c6e2595773b0cf620e04bf6a. 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/US23A1501594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64e5a741c57f33e5e7bedd8578d8fce19140089302bd84f6acd107e062331d78. 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/US23A1501595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29d5d64be172e2963c264408dc129d9d888d5d690a1f8ed6db5d935bcd61ef16. Chain 2 (Bitcoin): anchored in block 957011 (2026-07-07T08:25:35Z), 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/US23A1501596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd19af8a2539a8cfc0ca71b1c473ccb09e519f45e2e7124e54996b1ff8304b8f9. 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/US23A1501598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42a14df03a387f27d67952aad3adeba9ebdca27aef9a7b821659507bc7a66779. 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/US23A1501599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5ff198ee2f509a4d2824c8ddd4e137231b1adfb144a2627f7d1f6c9a7516540. 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/US23A1501600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b9d0bd62c358341984449104c6ac04b5af510a514b902aa51db7e8618b469c1. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/US23A1501597.
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 0x4027f92fddea71c83d03b8ab6d3420b484df10a6262384c4defe44dcb0e1dfa0. 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/QZTPX2492207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde329374636b0276dee120b0c77f8ce23506f4befdcbbd9e94b3b2f4beadedf4. 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/QM24S1908635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4485085780b59f24316f594ed1cee182318c22e203c8ba4591d7d00e723d553f. Chain 2 (Bitcoin): anchored in block 957029 (2026-07-07T11:17:55Z), 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/QM24S1908636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fed041e9b5da4b0bb0424f68d8408844fee1751269a208f50ee50978b0db22a. 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/QM24S1908642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1020f5bac76cd110bc5938cb67f641d81c700650b3a99ae774a1e733d9f676fe. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QM24S1908637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe38191206d1cf9e85b7508044096abb254be6ff6c0cf7840c6710c0745ac2c0. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/QM24S1908638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c0b0fba7ade04b06e8d94f2a8f2e4538930e99f6161e02c530965cb5c17e411. Chain 2 (Bitcoin): anchored in block 960384 (2026-07-31T09:54:03Z), 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/QM24S1908639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d293c5eb98fa6ae7e08083b14454f3c256e31cdbceab6554c7eb0ad1612b4bc. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QM24S1908640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4893ab3dd39ce7d75dc8c0c9bdd8d4428e9d2531f4cce123bf510d7d70d5242f. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QM24S1908641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb48b2bb749f448a26ce4ac0451d82f9085129c0e5cac48d05448b6f1091cc9c2. 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/US7VG2541849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d5a5dff340fe3bf71d6be42a76587ef2dc6656d84e6bff0bbb64e81bec7c462. 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/QZW9K2403985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x288c3f7c9ab3729d2514f87b7105ef42a479a8ff4dc9bbd02849c460503e92f8. 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/QZTVM2466861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b673513bfff506b183ad6c4d7f9589e0f0d0b2cd4632bde5afe66d8515b796a. 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/QZB4J1867637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa94ce03717b1eb6429cf19adc57aaf72e502880a49dfa7c57a0c0c73528d5661. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/NLRD51968325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55d53981d75413b6db15e5f5ddce641589bfa59f821caca783a045b824d8664b. 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/NLRD51968327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf36d7b64b95ddb7fb2f5324aee685eed1963fe0f366e6b14360e8696a8aa2252. 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/NLRD51968331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x761266f79757545f4edf4117f06f5cd807a2f303d0202c34cb2eb854148c9bf2. 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/NLRD51968332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f9dcd0131ecf9caa32120cee16554f5794d4b3f9230682fe9958c609560542d. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/NLRD51968333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0148fcf7fb6fae7ebf1203832487642724ba0776a68208aba5f276e0df00a41. Chain 2 (Bitcoin): anchored in block 957026 (2026-07-07T11:02:43Z), 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/NLRD51968334.