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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 0x0c038a6d92bb6488fff32d11b8078af62afbc61edc784c09b1d0d973813ea905. Chain 2 (Bitcoin): anchored in block 953727 (2026-06-15T02:33:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8e09cc8c-f439-420e-9d01-4d51c6723b6a.json and https://artists.proofprofile.net/proofs/artist/8e09cc8c-f439-420e-9d01-4d51c6723b6a.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 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 0x7a14e9368fda9fac838ef572471179b1193a121e430cdde267ed52724a323fd1. 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/QZ5AB1649051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc9c46524a4ea03e552349ff3ccf8357f61c1c2925e71585a0a0045019039f98. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/QZ5AB1649052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x298bd7a8d1baf37ba53aa4aea221d10eee4d93e2898df1201e74cdb8bc0d131a. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/QZ5AB1649053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a1a414898348dc135fdfe4db902e1f83f5f897465e9f3588893a0dbeb381342. 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/QZ5AB1649054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdec019b56a066b5c4b7707b81c270bd0b6a4a573f0736e10da464fa48efdabd3. 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/QZ5AB1649055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc22bc00b4159b09b8b8edd14b28770a818ac18162385fda38450de6daa23c9f4. 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/QZ5AB1649056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb854d8aae86a10b78d6eedc46b5005bc3c5ffe828bee26b03739845dfcb4b772. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QZ5AB1649057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde720d23d47c632674996fe5364af79bdbea7d29d762ea3c44fa92eb0a0b20aa. 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/QZ5AB1649058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a3cc6bc62a02763f8755d5979cbfc487f9a3b8f88b6449d49401411d4d4e179. 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/QZ5AB1649059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d90f42335b57e84be43d930345a138dbec450a53420b581fdd0b8a5744b8168. 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/QZ5AB1649060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x338d3175661f3cdd38f5a8589e905c59bb318eb55ffe9f1049377fd1c230b440. 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/QZ5AB1649061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cf706e20eeb2f00c1d71e5455d6c70fe624e5d08a3c251700345f721ffcd14b. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/QZ5AB1649062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc585edcd07cef83d70da0350e036d7bd786bea39161065f2bbb06ca770ce9549. 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/QZ5AB1649063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0db175b60b7db20388fa4731e636ba653158738cae2132d2b62634738ae33f73. Chain 2 (Bitcoin): anchored in block 960191 (2026-07-30T01:51:26Z), 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/QZ5AB1649064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12c53ba095fb5b1c79d365f90a13b5e79c6fa39ccb59264dedc9369cf6722b77. Chain 2 (Bitcoin): anchored in block 960166 (2026-07-29T23:39:29Z), 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/BRDEP2300253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3137868e15d8b35a2130d1cd37a729ce07302406e7ff7b0a14becd23d8091cd. 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/BRDEP2300200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e65dd067e43df6a1443d1b33e4f15bc745da947a33d87eabbf20feb460d1aa7. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/BRDEP2300255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f193108c551295496e47d64d43216bd03adecad535ffdad3aece076a539a155. 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/BRDEP2400141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8cdd0b4f0adfc6df6877d290e3c462f58a4edeb2993639a8edc866ebc4d62c2. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/BRDEP2300595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3137868e15d8b35a2130d1cd37a729ce07302406e7ff7b0a14becd23d8091cd. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/BRDEP2300200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29c965889316f6e63a857856494d4882f90924b604c654ca4936fe3ebe0a0bc4. 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/BRDEP2200460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb52a8a23ee4ac990fc9c0125b0c2e6d5906a3ca185eba2aead20547d45a89fd9. 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/BRDEP2200432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f1fc45a6b15522c00f5dddcce4b9e0635caf2fb7f58758d109e41efb19bc6b2. 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/BRDEP2200105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb999e3ad937f431dc10724dc7e52d51cd1a0cd65bc464916e9a760029fe6014b. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/BXAEO2000005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbae2b17c11413b36456443734675d4b6378a082813e3e31c99d273885af098bf. 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/BXAEO2000004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15279f9ec1de2041e2591c49c3bfe246c66a85476fdc10595579f026d3a62f38. 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/BXAEO2000003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0ed4f65e58c32a4450e07fa71aeff6d60d3cf262bafb9c44df69832d3103100. 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/BXAEO2000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa442dbe8e9288b747d5b18f4afabf9f86c5c6a40709ce9dd1133e1acbecb2f56. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/BXAEO1800003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd956832ed988b8a315bce007b9e7e4d3689a24a7d94aeb97494317532fe6bef. 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/BXAEO1900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc5571f29fa17506f24c6f410c1d9264e1f40342f0e4011c4bf68c688883637d. 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/BRSME1802378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06e510bd8f0693c4791f8c548a33798ac3515cf9d701262aae38b0bb52145cb4. 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/BXIP51700015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7578b618cc8700ad5bdfdb8eae9be48eee89d527202f3f02d14941175d0d735. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/BXAEO2200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x864e4ded2538d5c47e3c7d7137e3dd8176a75b899f8c0c34f5315b4c11417765. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/BXAEO2200008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb9b06bbbf6cd84f8896c2d83545e542a5f8efd3eee0e987ef1f266b9bf751c2. 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/BXAEO1900005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x774d7fc584c822326e43c2f24092ee08bae43dacb6f8d3a59e7fd1d2f50b7146. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/BXADM1700001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9558a91be7444014078c5ca68dea40ce537050dc2fa2a49e7c557df4c03565f. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/BXADM1700002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe950a739f4a2b8fcd0bb76411162920abd077fcb33e5aa6496aa0a1401664c56. 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/BX1KG2000029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1c6eb3342c8f2a4d0757025f9e36ffead43bf0b0fb7f8d9293133de94a7470b. 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/QZGLM2065594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73363ff3de9d59b51981f50e658ea001dc23877f8cafb229eff7d6e4a7a95c57. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/BXBOW1800010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x897453a1757ec2db585a027de14df63294e9b3f62b545690d16301afe3995dc1. 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/QZQAR2200010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd727720714af68b42e8a9d133021809043b94d337bc97eeb9db44d0f8b583481. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/FR10S2547553.