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 0x4fc2d9b175f8c16627ff247c91ad72c03e3c1d989df26917baf2916e0598c121. 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/5e52ecb8-4157-4b10-b630-c4e566b58073.json and https://artists.proofprofile.net/proofs/artist/5e52ecb8-4157-4b10-b630-c4e566b58073.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 0xc938e8f0af39503cfaebd59c4e41fbf05c03e32c7531fa776bc80b3b5c90d29b. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T21:05:52Z), 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/TCABF1213214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15978b7301756fc2b8e5acc3416a8b47b49cef2aab8bb2019e80a2b4a3cbfdc8. Chain 2 (Bitcoin): anchored in block 958653 (2026-07-19T03:54:23Z), 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/TCABF1213222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf94fcda55c35e3c111920f97c14a1a483025ada3380d47a67bcf57430c299681. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/TCABF1213224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd7263544e671c97002a232bc7c49de232a4b05f60879fe071a64441ec54c2a6. Chain 2 (Bitcoin): anchored in block 958571 (2026-07-18T15:39:25Z), 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/TCABF1213226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbeea7a20a84ca1e1825bd6bf16c7cf6c28eb24049e2964fd923aae8e8a8551ad. 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/TCABF1213231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x399e5f7ea8b8fdb78bce6755c5cc8f632a2aa46bb569a5bc165336893dde4003. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:17:04Z), 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/TCABF1213235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b638e1eee5504eeb62d0ec4efd7654e733de04d9c87b46ef2153815d09cde7a. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/TCABF1213243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2da7c5cceabd6eb78079a7e85260bb6180e9a5eba2d91c37dacf4047fe7bbe4. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/TCABF1213244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65e03129fd95c8ce7c9b2d9698c8c22a175c936b7aaee6a255ab920bce4d4a96. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/TCAAZ1139064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bddbab9f17dd8d26af1527aeb427b1edfeb507764979fb3252d18d7ce343a38. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/TCAAZ1139068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c880b6fb2873d7d31cbec97d81203a3584b8e38abdd5ee693116b0f3ef8dad8. 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/TCAAZ1139113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb5d55c87f03e3bfd9791371f82a9dc0bdd02542932e903e853619971720b18d. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/TCABH1286435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9c1ba36e414ff51a602403e266ead66ab2f192cc7a0e844fb32bec39c737d61. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T21:05:52Z), 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/TCABH1286437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2aad8f53a338f377ac9dd3648449141355ae649363330b41032b7a8ff53689e. 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/TCADS1892763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84f2f3481f21c01029e06e4d93bbd9e0b551ada201ff6f0e4007909332c9a77b. 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/TCADS1892775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1af30654e088ea27a1b6572eb84eadefe6a3dfe84550f36904224df01c8760e7. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/TCADS1892782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0998bb59bfa4abc8fd9c37d0ef6c7aff18c6a4c992bf8b59cfc55760e4291f59. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-16T00:32:20Z), 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/TCADS1892785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe868a0fb1cb95a2f72c9c5179ae0b8cea2d6a8833ace6a0f0dea487853875430. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/TCADS1892788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfbedac637427d403fc6529a4ddb658fecdf42883813cccc5ba96bf4bad87ce0. 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/TCADS1892802.
Cantar a María (Santuario de la Inmaculada Concepción Cerro San Cristóbal)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24486a9555f8682c282ee8b0999e1a5edad2a14bef3491d4f241b4e4721a669d. 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/TCADT1825314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07533afa603e48b5ca8d465e7f86bb1a89b49ea5c5d0a61403c83a3d9181e7e1. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/TCADT1825322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfff81f1c768aa80bc53c7aef1c5f80967fd698099be13dac12f20dd09b80ee3f. 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/TCADT1825328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64a71f45f4180cbe01e807374b019c2d3a091974ad21c4ae8110a6609de32695. 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/TCADT1825334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf697626456de123f87361defa71f77882daa8cfd9573303b422dc2506b591c70. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T10:04:39Z), 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/TCADT1825349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf739e2c2e9ae5b045b5f95a103542be4397ecbe29eef6f19a83751234246490c. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T16:20:56Z), 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/TCADT1825354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98f99617f83382fbb5a3839b2426bbb0ec36e8707a1b0eba4aaef7531459114c. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/TCADT1825379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f16b99b90ffb6ca48dd27e5e20a03e759034f7553950d602d55957631054d8c. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T16:28:28Z), 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/TCADT1825385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf21043b0295206443044fd096cb009570d06250e911936c7311eec6fd2f90ff4. 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/TCAEJ1973792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe586a2e47c1f1410502f2f84797ca2badf940a64a11063c2718aa3ab57464391. 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/TCAEJ1973811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2240c0f661a0effc5bcae9633545fd30dfb2cbfa0611271a833e8d308090c0bf. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T14:50:38Z), 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/TCAEY2027316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf65f0b80b4a28dbb1ba66262b079eff94586374be001f3c4579f3d4b8e752f0. 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/TCAEY2027326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72ed93749b034680dc865d702dcdc24c4b72bf493f38979df14f4450dd5f2d99. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:07:29Z), 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/TCAEY2027364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67ee4a15829d30fb07250f42b0bcea6b0f2abd3db3e3787fd792e6eb99dea82d. Chain 2 (Bitcoin): anchored in block 959002 (2026-07-21T11:47:29Z), 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/TCAEY2027407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x014e464e11fe5fb86a89d02f6b58798b50251997e712c84f57b0d1e7f1d38644. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/TCAEY2027408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11fef21529b0c44390b7f905eca4aed2c6da85b0eca8af203896bb2c4a2b4331. 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/TCAEY2027425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27e9280a2bb71a9befa458256510a24bf6fb639a4be3d92ad0d0636a18c2c6a7. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/TCAEY2027438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaa36513842659a7eb046b34469f2df0f1f90749a7a0134ea2f2493da8fdf073. 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/TCAEY2027440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb22949e0a451ac7e26f7f7c961a148eb4a0dba766475d894e83ab9992162f13b. 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/TCAEY2027443.