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 0x713979839061345b08232828f524cdd6db316d1c0cbd61650efb676a9fb40f9c. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/eb903e6f-5ab5-4f69-b244-82516603d019.json and https://artists.proofprofile.net/proofs/artist/eb903e6f-5ab5-4f69-b244-82516603d019.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 0xaab335527e3dbae179f1a943eab10aaa4e0e7a87a85804a3321d3610dc0b9640. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/DECM11727602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94696d3b5c558774595c4b955ac6c517279d3cd3deb70c31ee99c85a3aaa3265. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/DECM11727606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf8975bda080b832bacf5c98566b2900cb7f60629fd3af7bc03441acd4dea0c0. Chain 2 (Bitcoin): anchored in block 958830 (2026-07-20T08:07:17Z), 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/DECM11727610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x418be66ea9121ea81b0134e59d1ed47ba73fffad9641975686c3939240e4910d. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/DECM11727612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52e16543802c6df94ef3f1642a8669fb2b039649a04ea0728f1d176d621c7169. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/DECM11727702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7eb5ee1c1970b314ff85e401edabfe7c804049f5afcc1ec531e931b83687f6a. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/DECM11727704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb68a8cc8f0c0b6c4bda9b6f911c75cb51224309d740231f0905306c32722921d. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/DECM11727705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf831f11209918a5fe114e40fd3b922bd16a9425a034750175b6e034a491947b4. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T09:22:50Z), 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/DECM11727706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfca54a02a4478e088c7508c98ae9ea6c699635379e301bf875ad684eeae05e20. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/DECM11727708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84a545df5024203aa70d3ceb9d6e5d56aaf27ce97f522b292be78c4e9bde9ec0. 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/DECM11727709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6720bb3355d81fcc5950d879703f31860e0f73d51264461a05d32ea09bd22ad4. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/DECM11727710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0b5fc44d3486330c3309d5952bd1d609e76b35ca2c1ad10a85c55b6ce0c8968. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T06:58:53Z), 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/DECM11727712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd3dc95b7680c9a4974ab988ce7e08f2466445adee4d93e9d9f03a000afea205. Chain 2 (Bitcoin): anchored in block 958558 (2026-07-18T13:44:16Z), 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/DECM11727713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc450ae53dd2c9d0007e008c8b787a10e90e956e2ee3eb525a53f734af5c2086d. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/DECM11727714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff1445657993575be88d62d733b5f085fbb9a7190865a03ccbe76bd56ef80e90. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/DECM11727604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e40197892d3bbb9b2adcb6dad3f7c409c2df936f2c7e61e405ef07ab78f374f. 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/DECM11727902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13f340a67ea35e3466531e647cc8fc21e5bc21ae9b03aca609e2ae44602b9472. 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/DECM11727903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x301445e1d8509f1040453e4064aa86f8c3d471f4af8a0e5709e4a4f6ece87575. 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/DECM11727904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe12e82ab11036315ecc152f96e8cc4a1784f99cce2b79206ca333a881121ec2. 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/DECM11727905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2de6e3eceaeb9949b0cdff4ef2303536d5150c868758cb696b95c408bb374092. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/DECM11930401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a9c4d8a7bb5ca013bc40534b84a65eca919159e42fd021b851488f91d8e6173. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T03:01:54Z), 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/DELJ81954521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4d15b3ed55cfaaac1544b85bca9663f8cb9dd078ad8473cfcf85f0e75b5cfd4. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/DELJ82039934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde91932b32bd7bbf70d2a74fcef2e53a316e7a0d7f8d3756bc7a584afaadcfba. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/DELJ82039935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ef92d8b0fc408c931d0b1b36b55476c70bdd9f8b54677437fb342ea115fdea4. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/DELJ82039941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5363e99fda19d413c4100551755cf7e6cb77ae91b8d843b6da2b89882496af6d. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T20:06:00Z), 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/DELJ82039943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe403f24a54b0cc0a2e4f405e51a527d5ef3bc3c38ae2436bde7c59d8dfe5299b. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:51:14Z), 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/DEZC62132351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fe07c1e6bcf6bcb99c646ef1a391f83ada1d09d479d4c70de860e71178d3984. 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/DEZC62132354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dc31c72cd2b4da7a2ffc939c30feb8ce7fcfce989de7dff080a334948be4fca. 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/DEZC62132356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7de269922543a45015def38b49902ef51d3df12e3c0f189dd344b4a6c2ab7aa1. Chain 2 (Bitcoin): anchored in block 957884 (2026-07-13T16:55:06Z), 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/DEZC62132358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0916692b01f1ad1ac12fc07a57402fe9f8cfb15eea4d39a83c3d1b223d13dedd. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:42:08Z), 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/DEZC62132359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc82f93670c60f8c05b10b35ee07c7624073e47e87c9deb794a63789c548f570. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/DEZC62132361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84d85f6c013b291df37ff23437372dbee73302c24bc98996698c8cd7b99b9d60. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:43:44Z), 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/DEZC62132362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2de6e3eceaeb9949b0cdff4ef2303536d5150c868758cb696b95c408bb374092. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/DECM11930401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x078533c7dfd23b9f9908fe023441c8253d4a34f49456c10dc698ae43cb1844b8. 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/DEQ121856810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03b428c875f680ff130e83a049d6a85a6f56ad4b25a052b051ca66b6f9fc64f7. 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/DEQ022272616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb38f8a36cf0873f7380a370945a2a8bfe9f2c66711ef045ed8f9180ff0b84676. 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/DEHC60800253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6efad2d6243e41a16e55d8fb0bb58af15648c618175d4ac28ffeb98d1817ead8. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/DEQ121856818.
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 0x5d23c7a94c3f5542f13cb2f3ef1b3c05ec64aba31e7fa321e5fd24bb5504c18f. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/FR0Z50026707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f5f37d32a5e765f25d1d5f637c23899bd3fa1af8d9938888e49b1981b499d3a. 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/DEWE32000150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7e2853c17b3e5f51f8e7fb8418026402a59872e4d0a9f98ecd107f7cfe38a5f. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/DELJ81212261.