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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 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 0x9ead407021f4d91b6296afe20b4f22b4b8e1d44b544a35585d27a6c7bc06e8e3. Chain 2 (Bitcoin): anchored in block 953746 (2026-06-15T05:25:34Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a53b5f5d-4d93-40dd-9e48-4afbda02b3b1.json and https://artists.proofprofile.net/proofs/artist/a53b5f5d-4d93-40dd-9e48-4afbda02b3b1.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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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 0x295d1069d92825b2b775d9a46dee6b1b01ef93b977abaf0b844acce6c6307907. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/ZAE531300036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbbf3dfeaacfb1f446a4b9f0527aba13154665377ecff4e273c6ea910285541e. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/ZAE531300047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3f81eca149d7a940085085bade24ea82bfd61cc58e29e01c7288782c4d64dc9. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T21:23:21Z), 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/ZAE531300037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x739608a878d06233174529970d0bef078659397c580da06e949ae49e79aefd0b. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/ZAE531300049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c11604b6f2895e5118d45e64821440d7790a9aba8fad845696a5d14b6770590. 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/ZAE531300039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d787077950770d8ab8e28ffa3f7a859aa590bcb11ef17de77f003b41f961000. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/ZAE531300051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa308189db4a35f6e458a55ef1738bc00694984fe236ed67f902ae8d3d167e762. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/ZAE531300040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec218dc7a978d0ec774b5c060f83c123247517d40e90feaeba6abc16b6777111. 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/ZAE531300041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb71194772b9d76cc918c0c6ab9994813ad6626662dad7d4b1218ddce58ce715. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/ZAE531300052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa32c4065d16c2c607e838631839c77f95e57dffe7980b2f71b8cd9fe1c215fd3. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/ZAE531300053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaf955448351507cbb9d9ad34167d856fa81621c30f2d2f4be0397c68286cac6. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/ZAE531300042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09f4456c1abc4382c262f41498e2bc241be4d3a4f38c700fe00ae34fab305f99. 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/ZAE531300054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef9f370da7b520bf79aa0d5def63bda6fce06e943100f7f72694e84796d2edd1. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/ZAE531300043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f9853da8b9959ce1f40ab39639c45e6f1510106bf36a6f14c4b2ab5f5587b86. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/ZAE531300044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd891d5682ec61880e6487f506631ef49f8c7173e6c89223ce41bf54f3512e824. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/ZAE531300055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5fbabf06d1c9985bedb9f76cc6085cbc239dc1acfa121846539d3cf76083ee7. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/ZAE531300045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92c052be5c05d9a91d6a35ac0faa68409be9479af7d5f6de8c2220923bf06ed1. Chain 2 (Bitcoin): anchored in block 958830 (2026-07-20T05:30:12Z), 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/ZAE531300046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a94ec452de1207ccd62beb1f321497a4c934bdbdf48fba7cfdef67b73ea5ed4. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T21:34:21Z), 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/ZAA011500410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa393680987c6d6341f6cdc1f39b24d46dffb6dba56426082f207cfabce354719. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T21:34:21Z), 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/ZAA011500411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x948c1b016df2f44879ee46bd4adc3734954f53d9a33bcf5b6ba26d11fc072e6a. 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/ZAA011500421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4419f295c176e1a7d9345294e7ffa859f31ff1c4583701f5bb3f7f717ca21d5. 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/ZAA011500423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46e017eede3fe19d03f06777c6dc4f1a6485432903a1bd5a64a3aa4352e35ab9. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/ZAA011500425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08f99c556fad6e05c5887c6326ed0613d1e13fdd4faaa52cda9a3e1fe616a545. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/ZAA011500415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x746fa8f3e187cc28a15f68d883a37f9130ab41d172e45bd82ba442d912c93bb9. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T13:01:04Z), 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/ZAA011500416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cbde21aac5b487f2b1281740347fb726b1afaf721186a508d2d39fc16002b1e. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/ZAA011500417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fc586b81b66962dba2013da90666f6bb920212aed644141d0469cf9c331b47e. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/ZAA011600525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb47b7f0242739acdefe6bcbc2bbdcb65a406f953dfbc440e5322818962787d15. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/ZAA011600537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84d48669035e97ff469af401f5b7e215ca99f28a1a98b65a0cc0577d0be6f818. Chain 2 (Bitcoin): anchored in block 958903 (2026-07-20T15:22:45Z), 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/ZAA011600539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6ad849e6e63ac0be42d4bd232f4a6455ebedd57678f5db3c74c81c07394558b. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T09:11:53Z), 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/ZAA011600530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40bb8c66fc0645a0dc1f7dbfb7d0cfade0f4c5ff30721287629ce2e9b024c13d. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/ZAA011600541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd39fd2096f3fe10b0aa600ae96337f8265f6f867b13e0fd8d0b220759e750636. Chain 2 (Bitcoin): anchored in block 958380 (2026-07-17T07:07:02Z), 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/ZAA011600531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe4e33405e215a2bc2d2c2a4ec2a42db93dd0f12528e1184363d0ace73cd4704. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/ZAA011600533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37009782fedfb5fb8c7057372cafc5ce7e304f92929054b8eafd770c10119c69. 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/ZAA011600534.