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 0xac5fffdc624ec39c66e8230e8402b824d1af1f956667cfb97fc44c6d48672965. 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/ab7e69b4-6b7f-4a37-af87-444b49c6b9db.json and https://artists.proofprofile.net/proofs/artist/ab7e69b4-6b7f-4a37-af87-444b49c6b9db.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 0xdb6136c703afa93aac0cbd60c9516f47cb3e5992bd2235d2667fcd5b02fa2632. 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/JPPO01342937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f9875c23d23ae1171871ec261aa4cefa9dde94ae77adf3baaa508ffe8947ba8. 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/JPPO01342944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x277ee311520d05ecea75e098c6080d28ab3f9a652c384d3400d5d555ef3a3de8. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/JPPO01342951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f278a775fd78b8c7b361789af9f12e92c6b7529d63821d63e6ba50dd6be3604. 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/JPPO01342938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2c43de230232debe5dfec35ad75ac0b0a45dca3cfb462c8d6361141de245a98. 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/JPPO01342945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa1661622d8d870e97133f14b52d39685af0b4e6560d1d14fd3c5e731fd648e7. 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/JPPO01342939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x710ce32f7ffa82564c9e541a0aea511e98c309c01e2afabe8ab11934bafeb329. 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/JPPO01342946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a95441016271a93eb6abbad09c2b1c1dc33489ddfce8ec6bbd7da74bbc3f840. 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/JPPO01342953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x207d6b353286cbd2dc16813eb416777056a6bf6a4619f2357dc1301029695c65. 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/JPPO01342940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ba404d21c91db52f6057af8e2ae91cafed27c0af23b4ed23b4e2da33b36f6d2. 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/JPPO01342947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5b14e5ecfbde367cdd8843117d4620d280b68becae3ca8792bc3e25328930b5. 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/JPPO01342941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8532cfb95b2776417be7c23b57fbb47afa3a11edeee1bc0a4213367fc6a62c4. 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/JPPO01342948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefd097ed4955a01bedd64debdecff1671dff021e489add3174c211b0f0a4e37e. 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/JPPO01342942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6499f9ddea56ebb632959dcc56937d02a0b28696019118e492638ea2eb99e4f. 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/JPPO01342949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53e6b9a2b290f90188f2e15553f864d4a922fd28bdf8e3691441155d634f615b. 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/JPPO01342943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x980af727a628570f88b0c7b07378629a85bcf2b71680e3933f8447d7b5eec0ce. 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/JPPO01342950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x401199203ecc479a96a6ca1811e6300aa4cfc72ed7b27145078e070139a133bb. Chain 2 (Bitcoin): anchored in block 960153 (2026-07-29T21:57:12Z), 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/JPPO01342952.
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 0x4b704c65c13ab62c6c465f4f2dbf5a9f1582b5fd12bd1950c31dbf32d43a5bbd. 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/USC4R1605703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e20cddc8bf97f1e410a6edb585e7d5c326cc9963fac43b0ee8ed5fccd166b0f. 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/USC4R1605704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b3eff68de534d958d4b8d690e6e734757970b971295841edab4ad58adbf1d89. 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/USC4R1605705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26918d772115b23e1d2cf452a606586ba5f43e654c8c4b9c971ca3e4c9581ed9. 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/USC4R1605706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x042494d941557c6599b29e1da5d596cf1a3a81f493d0f2ff0c7ee719d29fa71e. 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/USC4R1605707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78435230d8123b7a949c393c84958d4684b4b2923f34a09b63993e77ee08cfdb. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-21T21:17:07Z), 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/USC4R1605708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb76e7d4bb11d32c965927126e5ea3cc49bd047e16ef48d0fe9b944d5f3ed66a5. 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/USC4R1605709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x443be40b07568ef236ba8167213b39d1acb7c22b6563afae817ff7c61eed7572. 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/USC4R1605712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92a21efc9093663277c27d8a3e6ee716694d42a599089c1e5144a2f5f7de7e0c. 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/USC4R1605714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2805d08a5513a940280de080176844f2958e88da97f918d216e9701d22ecd5ea. 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/USC4R1605717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae02200fe33947d87b77c3efe56376285f457800bdcf9920b83bf9134fad65e8. 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/USC4R1605721.