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 0xda35864fbf2227660734b0250417cd00cdaf27f0c7a7ab314d38541143dfb0ed. 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/9e19e414-6291-4645-a6a5-214605a1f2f3.json and https://artists.proofprofile.net/proofs/artist/9e19e414-6291-4645-a6a5-214605a1f2f3.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 0x0cf8db5ad60881f84d09d09faba4cb1b65d2068f28490ff24e6093d70bb6a103. 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/ZAA020800744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42952e551fe77bd247774eecd9c43e44a78335243494d8f6c404ca9930e22793. 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/ZAA020800746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16f20d06da2d31d4567ec6ff7c32751a9e677f02a73e279144ca6239d66419ab. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/ZAA020800749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2a65c21a5bc300bbd166ff5238cbd1dd856faf0cde76b799f58493893e3621e. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/ZAA020800751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5561b675d4793ccc9f382547766ce367a9cd24fba7794f7cdd8dad1e3212fd1. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T22:17:54Z), 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/ZAA020300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea53336f7c22c44e86b980d26d9c4e51ef942a1b0c5883e617bedecce6257da8. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/ZAA029300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x668b2adc58f27b9c393ccc0a313168be918bfa09f43a175649669ea083b5523d. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/ZAA029300008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf62601ff3b0680b57987f031da981e9397ceabab18f3ae57f111f931d70db73. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/ZAA029300013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e7d13b175d1c4d8c435798058072588e3200e51b1ca3bc99f12384f4ce67a80. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:04:42Z), 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/ZAA029300054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5096a196c6bd1f708497bbc5b2b80f8c593722778a81a9f11e399879f6a0fa72. 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/ZAA029600212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca1274aafd06eb41eb36e4d355ad8c51e88ada641407521f3371ec63dd825220. Chain 2 (Bitcoin): anchored in block 958625 (2026-07-18T23:11:57Z), 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/ZAA020500107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb94ca22e98085c472cff7f94997cddbcf46a7cf12d667be7b1e3a2f4b7a6403d. 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/ZAA020400036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee6486c2890e1ec67c2032eac93c9ebb382ffd03e4f05f686bcb0fa75bb1209b. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:04:26Z), 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/ZAA020600062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7799950840c8263245844871c448b0bf5819aed0859447fe0981fd3b461b16ac. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T00:35:28Z), 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/ZAA020700109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x620cf03865966bd504895e3d9c1b74064d8b65e59a2cf4fa5a096c833bb36a49. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/ZAA020500106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc22a07d3f8882c9b53436a02c83f6caadd65f3bb021c958c45370ab8f561659d. 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/ZAA020400035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62ae51de7ec81b197b68bbcd61f01b2230f958143680f84fef322cea5846a746. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/ZAA020600057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ada77ce1c8638cdc051582406e1340860977276783e0e40c197ee143616b154. Chain 2 (Bitcoin): anchored in block 957779 (2026-07-13T00:19:08Z), 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/ZAA020600058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23969763ef036cb7067c3a4b4b8806d359c6a83eae8231b12817fddd68bdc615. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/ZAA020600061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d01a120645514a05b1088ef543d64fb5d81ce85726af123a383116d5548ed08. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/ZAA020600063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5f7d10fe943d3993677176865a96815c0efda056d9d6cc869caa72fce8d0bd6. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/ZAA020600064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88b697c8a83f04a198f9d10769c16c99711fca1620dc39da706992877cf1664f. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/ZAA020600067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb31e47e49da7fcdb2e129ae94f969167fed43671d2ca061319a0d266e58a5b14. 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/ZAA020700112.