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 0x33ccf2817696617106c9aa0ee270446a32ee38e05401ac76280e69fbd918c9bc. 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/66ef1b79-7232-430e-98fc-ef884d38ce5c.json and https://artists.proofprofile.net/proofs/artist/66ef1b79-7232-430e-98fc-ef884d38ce5c.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 0xd9ee05f8f1b18d58433bd7660f2828600403728d8192b99da820b827b3ba9e15. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/PLUM72300688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec81c28add874d4b8cb9fd0120edb8be6bda177411a7411fd79a8bb93fba795c. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/PLC062417665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43c0a53cdf4198d2b5016e5cebf7faee0cfd57fb37b41b1b254b5f7920ed46a4. 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/PLC062417666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc1f77289d9a212be0baa6d646e392e4508fb9094ec9af937e4fbe3681dbffe1. 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/PLC062411668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36aef092f38f4040d525c0e333ea4a255b0c37129e9102238eae4ed1d6fd9798. 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/PLC062411746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x882a4a8d9fc0e459fea8189e2b740c149999536f2a0b66ac884f96871664c492. 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/PLC062411748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x866d928b9de596a527c782b99a4529291edebbadff67b99546c311573b63d0ed. 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/PLC062411747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f6582790d5b08838035e8bba430052f942817d49e4c58bc08399114e292a20b. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T13:34:27Z), 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/PLC062411749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb92654749db524c336991b6537977d460ec3ba3f16247e040d55ea3fb5fd52eb. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/PLC062417667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f3f26494d10d74c1c6c81f1710e9cc61979a4e3a8576d196f77280b8e6074ec. 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/PLC062417668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa394417d2a0c2811e0d18af646bb05d2e3bd4cc49ed4622b9625dfd9dda39f42. 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/PLC062417669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45b145ea1257e5bed442082040801c374ae1954122a5ccdcdf6b7fd60d14b142. 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/PLC062417670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3231117500ab2fd83bcc223a061664618643ebceb214035cd565d01fb8af1e5e. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/PLC062417671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f6582790d5b08838035e8bba430052f942817d49e4c58bc08399114e292a20b. 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/PLC062411749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x866d928b9de596a527c782b99a4529291edebbadff67b99546c311573b63d0ed. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/PLC062411747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36aef092f38f4040d525c0e333ea4a255b0c37129e9102238eae4ed1d6fd9798. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/PLC062411746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc1f77289d9a212be0baa6d646e392e4508fb9094ec9af937e4fbe3681dbffe1. 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/PLC062411668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00762410f0adc2e79b91594335ad6998ab56fb01cf451edf493a50100a1f2bc3. 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/PLC062408063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd618248a649222a510aadae0c2882c53b87dcd423e2184e9e4d00f7b89044354. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/PLC062401421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a296b3088bea1eeb1a4bb8346194e4acb63671b022f71aa8ed5004210d1558a. 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/PLC062396321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94d2d857db6ad216306917b6c884466b240320ac9116b2906051d625ede40e49. Chain 2 (Bitcoin): anchored in block 957055 (2026-07-07T15:12:44Z), 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/PLF242210983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe87e869592932ef88d684a2af5b9d390c5c61fe5e74c8c0754f62576bb64d5aa. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/PLI365917140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x807a62dec5fe47ebc0146aa7cb65d7ffe0989f93d0c4b749859778360837e43e. 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/PLF242210647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe23a9c59082f34da6ad3492357450617bc407d8c37983225553abda703ef518d. Chain 2 (Bitcoin): anchored in block 960225 (2026-07-30T08:04:30Z), 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/PLF242210514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c6e1c57240f7ec267991f1f8765b17c87d555c6216a188cdf92b9e9954dbc88. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/PLF242210501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa625fcb0f22618509044ce624e072fa81314b07ed2209b6d444bfa901fd70dd5. 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/PLF242210512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c6e1c57240f7ec267991f1f8765b17c87d555c6216a188cdf92b9e9954dbc88. 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/PLF242210501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb77b9f2d469c7f5b1d24c13c0e4849b8843537285fb7521d03c04af7d827d8e. 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/PLR862200718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcacffc5183fb2c123e67623384fa295b98b93486dd927854461540d96ccd8f66. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/PLR862200625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f59c1182a34e991928dd7615b564ed795cad1ddded54a224d198af04f3e1964. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/PLC062425728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf6f91c03424f6fdb3c430f4912691214c218c94e587a3f55bfd6d1c06a46b7f. 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/PLC062413929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf737b5e813cd9306eb6eb36ccb0fd644d2bbba44a02f81f271b81f7ee15e327. 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/QZES72337247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb13f1c3ae8bcdcfb06b9710b71ecb086f5734ec6adb0a56168fe1a7e172c028d. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/PLC062439252.