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 0x3594b6fd34e010c6165ac111878efa59ba4c992f4bca54caee19e0e0a75fde44. Chain 2 (Bitcoin): anchored in block 954097 (2026-06-17T13:13:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/79afd4e0-0102-4a85-ae5c-2380bf79d653.json and https://artists.proofprofile.net/proofs/artist/79afd4e0-0102-4a85-ae5c-2380bf79d653.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 0xf0c4899f96058cf2db9be8ecff330b82e1b96cf6a18ed1a3a9f43d4e31c55e3f. 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/SEAEF9133120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf722124c552ec48075f41a04dfcd3f3f1512b3b3159b99f091d8d790c1dcf6d6. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/SEAEU0630100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac5f33d2db27840732cd9d37cad4946ef5adc34a1a0065e2db1ecfeac433a7fb. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/SEAEU0630210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6f47463e7abe181b214a5f8460b57880a4b6261c1cb5c048c3c1fb1a9954925. 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/SEAEU9707010.
Goder afton i denna sal (Good evening in This hall) [arr. D. Anstey]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x384c2431e99fa7d288e83935d58c1b68eec5e443b9338a66a29d32d74dab4b8b. 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/SEAEU9707020.
Staffan och Herodes (Staffan and Herod) [arr. A. Ohrwall]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x974771e631cb98ec21d5b754d9e52298f9b7ac4b74d76cab84197d680fda988b. 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/SEAEU9707080.
Bereden vag for Herran (Prepare a way for the Lord) [arr. A. Bond]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c36f73c5aed74cffa4fb8f2f4119ea0aa4f77e1b9f160e6489644af0e908562. 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/SEAEU9707090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x069864c8d22510ae8e8b2200c02974457bcf509f3fdd754ead088ca5d04cd891. 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/SEAEU9707110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x378cd45bd1033db376ce9429e8b1fdaebe7e10c44727dd84c18a05b35de57d69. 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/SEAEU9707160.
Ding Dong! Merrily on High (Arr. C. Wood)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2791ed1b13689ee82f0a610cefabb39438d2491bf7397310015fc0b9adc7f0ca. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/SEAEU9707180.
Glans over sjo och strand (Shine over lake and shore)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7df31db9e577edcdc1f06870ee57c8008745a486f43758cfdf7793b5dc65a34d. 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/SEAEU9707220.
Jul, jul, strålande jul: Jul, jul, stralande jul (Christmas, radiant Christmas)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x977440dd419589c2459744960a3fa70390ade509264062e36d43e17e6ce79a81. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/SEAEU9707230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4551eb7079e8fcc539203b13bcd48cb707bede22156896cbf577f7d489543102. 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/SEAEF9133040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a71519619092bba07c538535501d3f493077d8b4b2bb00c0fda7d516a6b95cd. 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/SEAEF9133130.