thumb|upright|Alpaca chullo A chullo (, from ; known as lluch'u in Aymara) is an Andean style of hat with earflaps, made from vicuña, alpaca, llama or sheep's wool. Alpaca fleece has wool-like qualit
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 0x4d3c6db19940203c98aba6798d3196ff55ff5d00efc85a0119b82b6a614c258f. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/874cfb27-3b48-4a7e-9b6d-fb67aaa4d749.json and https://artists.proofprofile.net/proofs/artist/874cfb27-3b48-4a7e-9b6d-fb67aaa4d749.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 0x17e1a778ffd6c0be7f66c5f2e3a127e61a6e794c6df195c92f45df783dbef9d2. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/GBSMU9383310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x723f8b907540ad25e3bc3295a987637b668a71a64efa15b20dfc5912a5344dd7. Chain 2 (Bitcoin): anchored in block 958218 (2026-07-16T00:33:33Z), 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/GBSMU9383537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4f080aef5cea4ae8c244b2b3509d862e7413c0a0e69fbf2c963f80eca10fa4d. 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/GBSMU9759636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8889e462fb23d50f60194b3b902fefad997b2195ebbddca62146eb5449ec3693. 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/GX4R52113083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01062efa84bd41af2efa84f9e03db62715694cb47f40e7fe2b635269ac51b847. 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/GX4R52113149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf94f5db2c25f70a9b01249b4818577829c05a73a99468942491a65878fefb87e. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/GBSMU0045086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e6fde284f8f1d1f1c952a1e64b8d50d0b6ff923f33552d3d8353ad4d9fdd74d. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/GX38U2240996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f977477b3fbf686feb9fbb3bc9436159bd3afff811edac45d48066521ef1409. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/GX3HH2206798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e830d69568ff3147148f38e760ca101877cf61c59d64724ff60cbb3c8114e43. 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/GX3HH2206829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e91a7bedde75d99f8ee4351ae70ad8226a58d32049a11fc65ef1f6aa6699785. 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/GX8KD2224258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8af520b1e75add41c55c1b93109f6a9308f7b285cf0ed433d3f920b4627584cf. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T17:49:09Z), 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/GX8LD2201178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6496676f9587d42dc461af33f6a09134cdf163c4a025ff43eff76b8e78e4366c. 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/GX8LD2249883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2c00ebb6aa00e17c10e6c363971e5960de5bbfe3431f85e0a05f122d247e8be. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/GX89G2366887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f153f246917ea6a9122710918ec8c35cff080414b44b17eafade088647e9967. 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/GX89G2356686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e14e1c20575c21843a98b4f5bf375d525dacbc685158066fb8631d7aa3563dd. 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/GX89G2310391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cf227f9cdff417423a2629515f09901d35bca278fb42c0343d44248be32c3fc. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/GX8LD2360841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18df000b191b2c8b3df4b33e76a8f519f851d545194fb93b252b59c6fd37d63d. 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/GX8LD2381628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70374e046c494900db044c088d47bce7941ff3ac543f56e9d7abe984a7c771ab. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/GX8LE2317181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4775ff659709cc971ccd27d8c6443f3c433c591b47e2a0735759fa612953650. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/GX38U2364191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92031f6ecdb4dbc2c6fa986b0e14eb6d25eb925583abac1330dcc97cef387009. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/GX38U2387045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75b42d5c3e87f386992a50fc54ccf6ccd771408ace4ba2394cf9a80995d14ef3. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T17:59:29Z), 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/GX3HH2353912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e844a946096ed5401dbbcef3c852e35c5b2f9776dc151116382c498c7922687. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/GX3HH2377762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bd49cfd93eaa57951c4aa9c37bddbf457eca50403644b24bd66d14d679b4a9f. 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/GX3HH2349990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb30c3aa1c8527cd3400715d75aaf8b6dd7232550dc756f5eb3986eefb6277e30. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T04:33:29Z), 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/GX3HH2383864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94d04775552b9682db2cf81c31f044220dab945f096e563713b2e9a7ac1d32d5. 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/GX5MX2371649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7467eea9341aa6734fce72f2550f60c53f64fca424d4c31b28513bcbac928e81. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/GX5MX2301302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x367aefb445d2b3036904b63d3a9010282365abc6d265bd57e8ab3c92e01ed52d. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/GX5MY2361624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36d7507b6d51be9c667c5f32d9c03d967d7e67fb3e3cee151117a4765fab9033. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/GBKQU2408690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9340e0ad7ab19bc0b413180f59bb089cfc864c876a10570eda902a444a9e1e7a. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/GBKQU2408708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6ef6e610e322f8ba7800e3c7aa494ee68ce6f90cd50bd19cef32bef93045330. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/GBKQU2408721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc217241fc578398450a1f903e3fc3f934ee3cf2ff9ff1d1a00bb0d01f1b0c24c. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/GBKQU2408750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbcb7b162d2964d58f8ab3f17438b771a770c21c9a5285a62b556a21da7e2b92. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/GBKQU2449077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23fb15a367e8e89b9c8cc35e2d7991d64be02cb798f3ffb8ddecc58984a74adf. 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/GBKQU2461440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdc51f095e9b2d062d0a5c10ecc85bd63f25d7602bceaf973276ea58bafe9148. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/GBKQU2461452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fd3eb4921586e96629c385a25ec55ed91f432819d2a44693466f20c1b043044. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:06:14Z), 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/GBKQU2578185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dad0f4e513fc4f9e1bb0fbff8c4ebc5abfa3a0a9880d64d911d8e8a90d0fe4c. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/GX4R52113182.