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 0xa20101efe0f9391973383105de23d89a87c1c52ebb3b6ab88940a71e0706861a. 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/4dda0262-5f46-47c1-a749-71a87300fa2a.json and https://artists.proofprofile.net/proofs/artist/4dda0262-5f46-47c1-a749-71a87300fa2a.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 0xd3c305d037c65799ea8b2917f7a7e59d8a95f6f1c3be63f19bc07950e319b262. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/HUA611402281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96e9e6f70771b62fbf6ce3ac9ad44331fbe966e7c3c275fb0d3cad5b022b5909. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/HUA611402280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbec5e0b331ed48944b6f79c2499e4b3144c0ffb691ea558b2918fd073b909ecf. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/HUA611902483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe56ab354e412b74df800e6381935d9977a7ab71b2bd7f2e6cd7f5b6a56fd618b. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/HUA611902485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaac1d45148588eaf201e4a4d4fab7c59d33c7461e5d07ba949bb309915d1bb60. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T21:05:52Z), 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/HUA611902487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff9fedadc328a88dbbaa8e3a747bd98e7f98c37b232120a75eef590e94c2759d. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/HUA611902495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18c16af91c2d7e3faff2faa1e6474596d4fef9da723d2d15272ec84dc7f1ad59. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/HUA611902488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef2d1a8204e85f03baea86e0c40e50d072957f2fd90a405bbe6570174cca61e1. 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/HUA612301598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb3382da30060e4a879075d4cf77e0effd08047aa79675d556cec78feb956509. 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/HUA612301599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb40bcb298af0688c3be353eaa4faf27f1905cf4a4b1b16eb74e8e80f6773a4ed. 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/HUA612301600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa00cfa22d8b12343ed94eff16c5ec9e0bd4e5602bafa43a027f03af6711e9f6f. 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/HUA612301602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa225bbd12a88706937d1cf96594f194ee846b8d2faa8b95fe3cbc7012c803d3. 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/HUA612301603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4521b589905d094ca3d8ab7ee8e91e1d1540eacbc7ff14d01c9caf56b58f4736. 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/HUA612301606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a49c8563f4473709ed28f795a07ccc6ed5a4c31ed7d291d18e40eb7e2914492. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/HUA612301608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eb242d9152f81e62ac2027452f761bbe75339b51182735b1f824942f9c01110. 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/HUA612301609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ffdaacdfd8968bb2a0b4347fb6ad90b837dbb907b791f26f9f2e29d7322930e. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/HUA612301601.
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 0x3f0618338aac708b4ed9e649328b0967d4b7126404b43c8d402448c992487d92. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/HUA612301596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcbde6a4e85efd6bfc32923e84551fd94df8c300b37be038b989f4341ff0dbe9. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/HUA612301597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae032d43cc4a75a49c2fb4e4a6e1de4d288102ddfa518ba7797eb1e5484cbeba. 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/HUA612301604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f447066640182fcf1d4326dee89f6d3c7048e323eb3498b26ae3971ef2be1c0. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/HUA612301605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7010f66b16f44fbde1bb7b127c181c14b60cdda904cb54ce7ad15b83a4d97049. 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/HUA612401732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba0ee2b2608603e69f5e8e9bd6b4dc9ed0bc637c4d6f47ab8264d0b3f083f06e. 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/HUA612401724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7d949cb7df56289e0fe0950b7125ea26418c3d5bce990e8ed0dcebeb640da93. 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/HUA612401733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed0f92761e19e68621279db21d1435e44237a20f38af138d0c6e38b36c07ad3b. 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/HUA612401734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83092e320400773a2e9da86bf3f3f5c7135bef61acec741ff3897271676e8e9e. 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/HUA612401735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1d3ee0d737d8552f0218e013ed8c8ff68a4c21a4bf5c1865b3a70e7ec9f8c71. 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/HUA612401738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a9afb93960928091f24bc30e1704fb12b1f493cafaaf116b80d8495126600bd. 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/HUA612401739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6339668315e0b3b66df58f469cfd723faf78310c5ffc8a8541b2b9772ca053de. 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/HUA612401740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb39d5437278e6b093574c71b0f3680537deb814c0c93cb84c26e1b30924f469e. 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/HUA612401754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5607efb15fab0757482fb00bb913a6d81f69aca76344743abb739ef039740812. 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/HUA612401755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ef56d0cdc2a955dc0fb8a8d7769b6ea5611a84318af146e1ba2a3a467c39681. 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/HUA612401757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c3ecc78fa0ad00e8eeaac2be449ccef410323d09b98a11d94f7720ff7c3feff. 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/HUA612401759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd26629477a3757439e9ff23d032aa95cc9bb795206209b9f69889eedf5440669. 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/HUA612401761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba7f4e3abb6bdaa376c2cc0f38ff40a724b0f78d614efbee9a51fc07b529f073. 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/HUA612401763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33d35e03a02f5609ba35cd2d841bebfd3fd4ae648144e5d12289d89551928585. 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/HUA612401765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26333115b3fd03883d1691e67d9e0da699d4c08b488266dece4852396cd0abe9. 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/HUA612401766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca6d78d437c37662ce2dffa934b2ae6e24521bcd8f62bc89fc64606e4238b328. 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/HUA612401767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbeff3a6b02773b5f7b71fad0498d03bf90a55f9b29cfdad5534b467970d938e2. 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/FRX201834557.