() is an arch bridge in central Stockholm, Sweden. With a total length exceeding 600 m, 340 m of which stretches over water, it is one of the major bridges in Stockholm, offering one of the most pano
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 0x878c6c2a52c72c498c2c06a4ed37eeec091615c872501d8ea1081d2f9770b6cb. Chain 2 (Bitcoin): anchored in block 953803 (2026-06-15T15:41:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e79288a9-e0b6-41cb-a9dc-f22be6737485.json and https://artists.proofprofile.net/proofs/artist/e79288a9-e0b6-41cb-a9dc-f22be6737485.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 0x416931db1eab196cae569a61b703f66316005f73899dc9656daaf02f64608045. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-21T21:18:14Z), 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/SEUHA1800601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee784dc176c9328c748b0493a028f96806097865d36edb1d9eb9db69f94c1bc9. 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/SEUHA1800602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6fc3f045a0cfba7896995d0f77ef3ff7ec3a0020ffe0a0b74dfd0fc68f5ab2e. 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/SEUHA1800603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc53e485b086f8869f4184473a7ef433f663956a183069c371380923f30a93afb. 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/SEUHA1800606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe89e6b9d526dd3795c635073cf813d63ace080548304d12603b77c5a926b6a24. 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/SEUHA1800609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76ace1f0619105742986b74fba908cf26b7d246544cadd0ebc6a47e3de6f4c80. 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/SE3SA1500101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b3ef0a40d454e730321e1f00924c7897d40a4d575264a93f7a5d8e6e5f44045. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/SE3SA1505701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc778fcdbdb2afb339db6566a2087adb8971b039bea740e1e1bb301c7c2e89edc. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/SE3SA1601302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec8c10192264340aa91cd8d63645a76ad2a8dd5ee6bbc48859709d746a555d3e. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/SE3SA1403901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99d2e9839146a8122bb058a55e494bbcdb5beaf485b9e3e805573721b7728588. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-22T05:33:01Z), 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/SE3SA1400301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a6f6ba3f942f435d47077eb75783e8b3a56582ecfc277349d2426c39d789105. 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/SE3SA1402301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68e9183f3d22dc000ee4f05cd02b4feb03f55aa5c8ade1d9293d40a538ffee5a. 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/SE3SA1403905.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f92a7fbb174b0a2ffd7f74298c5b5b7e943dd14892b309ac3122884fcfc98fa. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/SE3SA1403906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19ae61d6d514303acfb90090cd9726f622b5042d4e6920e77f8e9adcd4cebce2. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/SE3SA1403910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c14d733864817931dd92800038951ad9eb176211e78a199ba71a19871888327. 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/SEUHA2400401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1099abbd1bf7d19cfae3848c76b96dc127f75a7f17b3d47b63fe0d47e26223e1. 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/SEUHA2300501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe89e6b9d526dd3795c635073cf813d63ace080548304d12603b77c5a926b6a24. Chain 2 (Bitcoin): anchored in block 957253 (2026-07-09T03:08:40Z), 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/SEUHA1800609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b3ef0a40d454e730321e1f00924c7897d40a4d575264a93f7a5d8e6e5f44045. 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/SE3SA1505701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76ace1f0619105742986b74fba908cf26b7d246544cadd0ebc6a47e3de6f4c80. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/SE3SA1500101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f92a7fbb174b0a2ffd7f74298c5b5b7e943dd14892b309ac3122884fcfc98fa. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/SE3SA1403906.