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 0x46785d5235381db11f2945e03397356f1d3aac4cfa3e1f196c71d0e73dfc3c11. 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/5a6d8492-e01a-4611-b387-e23de42a903d.json and https://artists.proofprofile.net/proofs/artist/5a6d8492-e01a-4611-b387-e23de42a903d.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 0xe0f94bcc7908b7a5c4b2573629bd925682579ee374cfd233125f52d6c8147966. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/QZES61919914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd75d1a7829b23668b278b356dd0fb7398f30457c05b0426d1e2af8af6073275. 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/QZHN42130896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8cff25c9bf690df174faeff1a701a7afeba12b941954a17d22645ed687703e2. 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/QZMEQ2181430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c2719a25c872c38ddfb777d685504c8b6d94f315bec7ff6168791605cf73c78. Chain 2 (Bitcoin): anchored in block 958585 (2026-07-18T17:05:16Z), 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/QZTAU2170802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe14e2fa6096bc72eb5ea2f61ca43f3cfb22094917ee39a37b2416035a40a865. 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/QZES62235374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4b21bf49555a00e348267689128cbf728cbf1930cdad9815aedfab35f82817e. 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/QZES62235375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28abbc40cd9543ca57a582377c3bd98ac90a25998a518518b0981325be8b79d8. 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/QZES62235376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ffaa1efb115b99a52f2f56960403333c50cafd09440adabcf003436701c0c0f. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/QZES62235377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf508c027ca248a2f3e127e7a64948212ce0c8b15ecf102caaa868d14e284dd29. 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/QZES62235378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7215d3a26f13ca065106997c0881b60f35febb2cea3759227bf6c6a1627dacab. 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/QZES62235379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09259da799184ab38baa5cdaf48bf98d6c9b92348f8c70fc0a596915510422d3. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/QZES62235380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0efd835ec1e5734a8d42168de9731afa798125b345b2bd622692c36db2500fcb. 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/QZES62235381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3aae4bd05bf9659d12b6d5677cab16af276e9eb28c1c2954fd4a7a2dd0ed569a. 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/QZES62235382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb71cc392964d93b693ddd54a12b42164c9f7aae41a5e2658f78be7c973c1b01b. 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/QZES62235383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb763a8712f39aa86b41f4428af2c4f7a9319bd7eab215d240a2593a1e5dd4631. 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/QZES62235384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8173e9a4cdfbe0426362903aa293e26468b986e194022aa5108d586926080a41. 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/QZRP52195960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f94102039f096d3ca05af2fd7f05c0ffc1b34568403c33409fc1175da1a2242. 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/QZES62235385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac371c5faf30da1af4ee9d9615deca89ec6ed381498aff07e96720bc87912172. 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/QZTBB2312791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde8a22e7dfc65bd03afa083dca24ebcad5e6f9c1f38f427ebf2aaa31ea085272. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/QZNWZ2461933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04435d1de1491bfbbe3820c771b39a7ff075b6ef370b584600c609a8e545c248. Chain 2 (Bitcoin): anchored in block 960183 (2026-07-30T01:10:20Z), 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/QZNWZ2461934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ed838d282163394041ab13adb0b594def19b0079404eef748fe5bcf90ffd178. 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/QZNWZ2461935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf07081c77da1b040c84c0226c5cd96622ddc3e6ad946cae11857c6780bca2934. 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/QZNWT2316545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a674415d85637de6001d36c22a85d9fc29f6662e1e922ba495a75ab54c9b078. 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/QZPLR2494648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b2573fb03143cfdda1682a0b4615ba0c3d8796cc8201dcb1ef4596598106c1d. 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/QZPLR2494649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9782c7d9d38dff5b140c65e4212fc0dc88bcfece340c1a94d0a153be1726eaa3. 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/QZNWZ2461938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4472163b464debb8196104569759236282eba4a6f10109fe1f44cdb643be0cdd. 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/QZNWZ2461939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07b8a49011290fd839f1b8458d28cd606a51d2835ee3b43a15fdbfb11977372c. 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/QZNWZ2461940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd079ed72c048dbda01bc1cd1424808b8b9d54bb2e1030580a563c7c4e956457c. 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/QZNWZ2461941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b7799510b67ddcdffee8bd90f9282a9a95aa5f565e9e077202401e68eed94bf. 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/QZNWZ2461942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4f7ea2083813eb7a70585eb0376bd8bb07d71dbcb98aae226aa594ef60add97. 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/QZWFN2334680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6f807d3cca95f8d8b76b09b10b5c61342afe8eb9ba9fbf643fba77bb831ed48. 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/QZNWZ2461943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x969a3c4ce9f457249717d1153bad96cbaacf305a382d50f6098e9211634e9d6a. 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/QZES52140786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfbddf9ad4e23340f3e48a0e0d1bff8b59a8d4bc2aa5a30e20051bc3d88a3c3f. 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/QZDA62249767.