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 0x0702d65d647a0cc78b9d107b51a9ca0ca6014d604c8424e12cd896dbb37372b7. 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/f70b4570-9f46-4b4d-a089-d6df22411630.json and https://artists.proofprofile.net/proofs/artist/f70b4570-9f46-4b4d-a089-d6df22411630.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 0xad4ccbb9aecdf89748f84c4bef2e853c3d3109bf26e48374ff30dc5ff7ef14d8. 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/TCACS1681453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdee167ae06f213ee00e8731020e79a519854afefe45e3e61152489d9e5ae18b. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/TCACS1681463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67dc8750224ad8d81b7e1ab6b78efb96ef715b30d6d17ef2708718b6495cc94b. 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/FR26V1648634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcca703b1b65ccc43435a0743756f59609a216881e0c3c84f49055abb8fc9b3af. 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/FR26V1648635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0553f1bc1a76cce15f7b0cfa007b74e553c06a0b2b4023f3038eef6f618b6f5f. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/FR26V1648636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4c36ade27918db4e42e5f2868e8f7c5aace1a9956100e0c4acf154e5792c0b7. 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/FR26V1648637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eab17cc84db1a47da701eed63e9ef216bdd58e38e4ac46146a419385d85a60d. 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/FR26V1648638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f40119cc48207f331affa67f0d00022ca290ae5ab0eadc2326e3740a3606ef2. 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/FR26V1648639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7f1d0cd143c021f87bb263ad0b2bb430e5c7fb53571e2ac561a7498ba723344. 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/FR26V1648640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdffa86fa13d8fd4c34559a03dfaeaa47404baaae41c70cf84c6d605b84da3711. 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/FR26V1648641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd891c9c900c4060488ef0b6336eb3bab063c116a5e73430a7c6c4ee4cac8a42. 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/FR26V1648642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe892bec0fa586ec7342e63b863da60874a38e612a5118e1ef7bbb6c37d407ccc. 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/FR26V1648643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f39edce865dafd9977b0652e04738f16077914aebe82d66b28ba6ea4fdbc8b2. 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/FR26V1648644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43f46f5e57d24a227da7ebddcfde74c028e7f3ad4b988bd678638d3bd88f1038. 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/FR26V1648645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ffbd70e5fa7e443204b2b724be9231612f4a8e5323e89c7c155ba40be4e4969. 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/FR26V1648646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b4ddf84d163ae876afab4965082f6feafdb2cd9716fdc043427ce9e01128580. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/FR26V1648647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcd4de0d75aa8f9cfe7dbf2e51c7d0b41d5770560d2657a12096f89cd80ea78c. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/FR26V1648648.
Ce que je veux c'est être libre et vivre sans contrainte
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa98a12db9f36d9d84d6b67f61e7ca4ced927bf1e86218b3ccf0f200ebf728e74. Chain 2 (Bitcoin): anchored in block 958703 (2026-07-19T08:36:12Z), 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/TCACY1758363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x506f2b9f54eeea10247e5347fb50187cd36553c469e364aeec31639b0f0ed98e. 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/QZFYZ2059332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x829ce7e94d97803f1ba2e52a02a869e6ee66dba2a24f74e6d2bfb62b3ad9e492. 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/QZFYW2098796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e1ad5c0457e7c99f2cbf30ff528241bad0d436ba2d492336e38c254c3125dc5. 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/QZFYZ2059333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9ea1c7b464ed8ead460c1fd70ad191d42365ef656ffe94cf6f1f25bae5b7dd7. 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/QZFYZ2059334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe412d2ec5960a8d07285a15151dce282cda56f3e63cda75a0075cf8921836b6e. 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/QZFYZ2059335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a414de104fe6c6fdfdf20b3de655c22ba5a6c5389e19a10c9b01aee36631d4e. 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/QZFYZ2059336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x124598b4e8b4b53539855a75c05e1afe2f743536475b4b6f624e937bc6862af8. 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/QZFYZ2059337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14ea4b8790cc5f3e6cb22f2fb9230dea1048445bf65a4e63821b7cd4315db926. Chain 2 (Bitcoin): anchored in block 960198 (2026-07-30T02:21:55Z), 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/QZFYZ2059338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53a421301c5fda6b7ccec3e5db7b41837e00624d603f80b3d531fa094b6ac9aa. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T16:43:41Z), 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/QZFYZ2059339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a3f4b54689108da197f1dfca48f9f8b6314c80075df417d88e6bb8ea52131d0. 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/QZFYZ2059340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0629bd7b0b5c20a8fcd52fa327cf531e7733232163c8442e100fd45e7d26038. 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/QZFYZ2059341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf8bf68f464136bbf159f1a99f258623fecf7b8258fabbd646361b65842e9a4b. 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/QZFYZ2059342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f9abda4e57066f5efe470c47927bb9c8ecb3f228067d222e9f1fd68675c6e6a. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZFYZ2059343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b411a9ee4211e47836fbde7064a1359af523c328cc57de58f6067e2adbf48bb. 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/QZFYZ2059344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb371dfb7a57348153cd80b6cca209f76acfbaa8ff15922fc51356a7c1d390112. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/QZFYZ2059345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fbffabf50e6321bc441b868918ba2caa4c54b3b676e8eb2dd5fdaeb32a5459d. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/QZFYZ2059346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf21e6bd8333d110a585a0c9a2393be221e2571424d7203c819f4df1f4c7d21cd. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/QZFYZ2059347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb96701a3fa049bec9c799b109679ea4ad7cf963dd8c9a47446c94feba2287869. 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/QZDA52126874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22ccb7fd7e71ea72cd5ff9ff5edc851da9bd464ff03e1388b72aa8e64b1f1b68. Chain 2 (Bitcoin): anchored in block 958407 (2026-07-17T12:08:48Z), 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/QZTAT2136644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02770fd11fb6806baf11e975f027e4a213eac4e9be996de15d13d34c38d82108. 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/QZPLS2408662.