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 0xd400edd7b309c3ab1c6c034a37de0208efa1981f7e42c762df756c715685f28e. 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/e8ad7c4d-7cab-4a38-a828-2325c2e4f983.json and https://artists.proofprofile.net/proofs/artist/e8ad7c4d-7cab-4a38-a828-2325c2e4f983.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 0x8384e3f847ecdd7faa6ca5a8ff032b528f67a270c3b209c1ee10616b13b8267d. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/INN632400030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9f345bb34d89769fc58d27e86edf2c03cf83c1116e1ff4a50c5f43d0315dfdc. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/QZMZ92410207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x486f56fcd91df1952ce7c9782c2188c83a6df42dff68a7847c9fa84a916aab3f. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:28:38Z), 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/INN632400074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x264c50f048abb82383316d9d0680c44020881a4e00ccdbd3bf0c3b7e7db0ec07. 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/INB822400182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa805328780117dc134d671a9ab5dfc10a26db17aae459471f96ebcd53f784e05. 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/INN632400089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9afc75b2dc8c3a349a58eefedd54434105c5f033d388cb61ba6a2046d2a328d2. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/INSH32400851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3ea3c97d6f88dd86fd25d39a4e98a58681c2d77557b2719411affcfe7919963. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/IND832403379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d3c9079ab93fe566d3a200dee466f4117786ccdc4eac04f8e668ae3c502cedc. 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/INSB92400870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6f4a93733ff9e1d86258e4075f4f80a536dd40baa095ae8b5809b7b6b727f5f. 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/INN632400968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5b0dc83f1a88e89ff1404c3722c514712878041de26eb1462ce721d0cc4b130. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-16T23:52:55Z), 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/INN632400971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ca2af534aac1d97889d54576dbcd647dbc07efbb6f55a761dc22a56646c0c29. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/INN632401253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1362c5db52b1d73f19650056b3884dc7a8fd8f3b5ec6148cd418bde4925c2798. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/INN632401252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b0972905bfbce7f610214fc08e86b28e0b07d2737177a41c79791c1e95a8bc3. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/INN632401338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7409fd1d4d456145d49223f0532d45a5462303b13151cb75af7711f100caf74e. 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/INN632401331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x339a3d896d526ba9e0cccccfa471a03e0fd850273e5daa5f263c52d557120910. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:30:44Z), 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/INN632401326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe96d4cce39860513aa711bc20781fe89335d8a1a5ae0a8aeaf9da6cfa52cc81f. 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/INN632401339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1635725032308a505f9b4d0cdf95f26c69f6d10b9f86ef49a4a4f0dc5f5c9861. 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/INN632500210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f0e1867a7e9a6e4b4e91e9741fd9a847990462c584fb5a90d79f0ef43d275c9. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/INSB92500418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4906636fe5d676f5ef8b95249f7bf622762bb01fd1a0e6cabccb206464189e70. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/INN632500405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f0643dad809bc58cf4f9dd86b7d5f6f6245cd72d5b904af5583c00d61aa7e64. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:28:38Z), 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/INP1B2400177.