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 0x9aab343e575060187d2c059083d2675e6b75b6ae8363a84318f290ff9b7836cf. 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/cdf3a8fb-8ad1-4472-9f98-ea90bef4abec.json and https://artists.proofprofile.net/proofs/artist/cdf3a8fb-8ad1-4472-9f98-ea90bef4abec.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 0x3e990eb71df5548deb560dcb5106ed794cb2b0b798c35a8b76fca97f30cbd1e3. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/AR00S2000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7312f0710dc7e88b67f7380922f9545d74bd3bf666c286dbf71358fbb5d2def9. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/AR00S2000003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14f65acf08d0eb02461e1d877aa3d50e6385b581cbba12b71f14fa4730b5570f. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/AR00S2000004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10885402abf137e831d0108af40747ae0aea3014f82e22634c53b48e9ec0b29c. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/AR00S2100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74d6aaabc599633acd14629dac7d401964fec6996d8c44e9ee4ee9a8cbf1b771. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T16:27:11Z), 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/AR00S2100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc11f3da76a28c239f1ebdace1e579fe7bcef01443a96cc91ce49401c86041986. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/AR00S2100013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc11f3da76a28c239f1ebdace1e579fe7bcef01443a96cc91ce49401c86041986. 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/AR00S2100013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f7818b72198b2a7dcf42cbea156a34bf1e26d0e8f46d0048015353539814cdc. 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/AR00S2100018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f9be4585ae3721eedbb45206899f98451bccc85b2ade2978564dbb122fe571a. 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/AR00S2100021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x140fe9c6e3ed8f0cfeeda05cfb9201935c8e515b48c6bd51fd2dd6d7fb211c2a. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T16:33:00Z), 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/AR00S2100022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2f051709186c2f4d3ed97942a83afdc56cc2a041dbc97c9c61a59ec88a1c71c. 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/AR00S2100023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f7818b72198b2a7dcf42cbea156a34bf1e26d0e8f46d0048015353539814cdc. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T12:55:09Z), 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/AR00S2100018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f9be4585ae3721eedbb45206899f98451bccc85b2ade2978564dbb122fe571a. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/AR00S2100021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x140fe9c6e3ed8f0cfeeda05cfb9201935c8e515b48c6bd51fd2dd6d7fb211c2a. 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/AR00S2100022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2f051709186c2f4d3ed97942a83afdc56cc2a041dbc97c9c61a59ec88a1c71c. 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/AR00S2100023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0decc50e4d7ef28f81d5d6de999189f99b95e8339b182e8d00bbc0e14c7b8ce2. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/AR00S2300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc4ad047a2f84eb806c94b0037e907218d9746751a49aca1d7662ba3254c7137. 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/AR00S2400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a2b6c3fb8a9e588f38549f3446eeaf71976bc92476f01ed97ebf516c350d32b. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/AR00S2400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd60f28712fabacff26b13c732bb8fbf14bad04ca1a82574df16956c199f874cd. 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/AR00S2400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd60f28712fabacff26b13c732bb8fbf14bad04ca1a82574df16956c199f874cd. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/AR00S2400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bad841fb559fbddb6c604805ea28647e0e5527393375bd962296a743cbe67ad. 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/AR00S2400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b8a09b74354edb918a044cd307aacc8b80629da07b38927ed652c2eba206cc2. 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/AR00S2400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xada7a95a799c0bb0357e822f997aa4d2dcd5cb83a92185ed6f2bc1aeaef5d349. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:04:54Z), 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/AR00S2400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bad841fb559fbddb6c604805ea28647e0e5527393375bd962296a743cbe67ad. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/AR00S2400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9daf92592e841a74f4318741584f544f19d916d1063fbc5be9d293220c2224d. 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/AR00S2400011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23c661c4002db78f4ed58b5a578099abbb880969d8919598ad7cbdca8383e8b9. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/AR00S2400012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b8a09b74354edb918a044cd307aacc8b80629da07b38927ed652c2eba206cc2. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/AR00S2400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xada7a95a799c0bb0357e822f997aa4d2dcd5cb83a92185ed6f2bc1aeaef5d349. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/AR00S2400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bad841fb559fbddb6c604805ea28647e0e5527393375bd962296a743cbe67ad. 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/AR00S2400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23c661c4002db78f4ed58b5a578099abbb880969d8919598ad7cbdca8383e8b9. 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/AR00S2400012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82a8649b523b4b6fc5b1ca6ffe40e3b2f662c68041a36a5871b7ada043807c26. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/AR00S2400014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb07fa9ea63233913ca001008035f19da2b5e1768a41a7b98f72a3c76980a4c6a. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/AR00S2400016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9446996bed22813891396966175f52a6a995e63cc91bf80dabdd1bf2ce25e00e. 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/AR00S2400017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70d0ee773bfa96291bdddda20e44bb2347c52d704497efc739a86a6d98969981. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/AR00S2400018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5509be82309b3a13a5049bb7d71b481e4f6bb68f9b7c87d3acf281f578fd9f5. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/AR00S2400019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e9674bec10f394476f10a27913a3edeaeca4040eb9929baf3b558b0b40ad774. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/AR00S2400020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cf2a64b9ed92115f80a22065077733bca8d52a318ee6e0aba888dcd8a72604b. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/AR00S2400021.