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 0x60148951419e5bef0b6fd9a5c40aed76329160e82e4aa34a86ab8b8afaecf591. 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/b8020387-0060-48ad-930d-30b78a66c9e8.json and https://artists.proofprofile.net/proofs/artist/b8020387-0060-48ad-930d-30b78a66c9e8.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 0x8ab559e3578ff60df1e4df586590d23af762ff962d833bb49748595be47028b0. 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/GX8LD2247144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37aa0d42adc163f0d78b86b1809d9560d6f28faea13aab1d81d4f9adf4b221c7. 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/GX8LD2253608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0379cfaf04c48dd29502ec6050fd0b8f96e284f1e27a6c47923f77afb818d004. 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/GX8LD2274601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6824a270f3d54f470752bf13e480779cc80ea6a445114da0e8b63d21ce3d326. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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/GX8LD2233684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6babbda4040d3d669ad27815028da42f5de040e0d55518b9de0782e930150d15. 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/GX8LD2203420.
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 0xe723d40816808b5caffdb0ff09976d2d7c9dc0c0e917342d1aceff28b85644c0. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/GX8LD2273113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32c4cb1043d54e559dfddfb86a2cb1a5eabe2de001a919a431f6b41a84dafb6d. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/GX8LD2259241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6ea9e42f3f408ff91b1f3a5542fc188a88aec29aa117ffadef29d562f133b9b. 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/GX4R52240250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bda5f657e11da896e20a653ccda6edd1df0d9104caf330de93c4d7107399229. 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/GX4R52240252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe085b2cf5274e4af5dae912f2860c01391c4d870c70917f227ee07d6b4044389. 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/GX4R52240258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4324c3cf6ecac9b45d8e43758e651e186eb83f54cb59bbd815969647660e0728. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/GX4R52240259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcdabb7e9d6b0f8e80d2e33db0157434d4196a46e197502c492cbe08b5a97ac6. 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/GX4R52240263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1418ec0dd25c264799e26d1221c99c67bdb87c4785155bf4486fb46d69d1722. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/GX4R52240246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x005338be249e94ade91252da42b04378084468740b2c2de37de66242f5d2b222. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/GX4R52240255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc219f996fa5b03ec9f514064e7a33d7a0f5f5058c51d15ee169ea84180eb6af4. 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/GX8KD2320032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55ef84aa8fddb40ed8ebad170ef68a4c6a7c17ea4ff195f0a4f3eecb2bbef329. 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/GX8LD2225387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x984f0ea9bff5b7729a31db844b65e0e1f1aad7034d4cccbac2880225989f4fa0. 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/GX8LD2203078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09ea9ba0a3749f6fa2446c940882a864e38f57b2d47f1394dd48f4f24f38890c. 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/GX8LD2286417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32a9456c5d409476fa247140cda77a0d6ddf3e7296029e473da9c74ccf1c03aa. 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/GX8LD2295930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf644715c369f0b5937d38fee096906aea0a779494fb303ee9c4a3568cbd7409b. 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/GX38U2309755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90f90c8e99deaec934c51f787637ce35d4bf2d0adf62c790e1a25e7d01b4284f. 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/GX89G2218780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8af9d31f4667bebf2b9c5828e1b1297ab482cd6d01945e7cc7768d149ae3ad61. 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/GX89G2218781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x725b0893a4867d33a7c132faad0189139719b505c6be13404033bf2f513c0ed8. 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/GX89G2218783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d181b9268e35cb941f40acd83088f58ea29702ac39a5986719b5daff91ffae4. 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/GX89G2218784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6172f45ebf99cb59137f740e7176c81dc873dd320fb7083f28917d1648d83dcd. 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/GX89G2218786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f0594f3a92de1135358efed811cf4f3f5c2405eade15020f0f58868157d433a. 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/GX89G2218787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88af335f0930ff1185b50b5ccac5d92147c34880c56b790735f6be7457f76a98. 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/GBSMU0112594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97e3b16ac0dfd2757f142e47a1fa1167c20e201b5f5d1db3de2f8a5bdb6d4218. 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/GX5MY2224302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4db681e19536d9e3b118aca22e95c16c6511fec8dc3a02683bc7ddeec29dae07. 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/GX5MY2224303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96d6bd01b3e7eb10367fa4947de11c904d439f2c1d322f8b3d9b2a070b38c2dd. 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/GX5MY2224304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a83a2fdd4c88d893da4b795c53f863d96273408a8c2853f224e334ad14f4128. 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/GX5MY2224305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5ab910994624d50a243be20d294ac15841be6ddced651b1d70a0dcee16b8e92. 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/GX5MY2224306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a11d59d10b51f95c25ecca79af2cf5834687d2756820f3b4c28e6683b7b6ffb. 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/GX8LD2216047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff2c5d23bb52693a75842e79b4159eb9dfa35979a53ed70bb5d6794e24887faf. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/GX8LD2252411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x220b6b75f0b9ead5cf5295859df2c469268d240230f8c4e32f46a2bbf413dc70. Chain 2 (Bitcoin): anchored in block 960218 (2026-07-30T06:57:05Z), 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/GX8LD2272747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfed664a784bb304730b9c4a9ba232401a72576ca6640e8a47fa6744f5d12d9ad. 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/USANG2291357.